【floor】(1) the bottom part of a room for walking on; (2) the level of a building.
* The book fell to the floor. (1)
书跌落到地板上。
* The fire was on the first floor. (2)
火灾是从一楼开始的。
【flow】to move like a liquid.
* The oil flowed through the engine.
油流过发动机。
【flower】the colored part of plants that carry seeds.
* The field was covered by blue and red flowers.
田地被蓝花和红花覆盖着。
【fluid】any substance that can flow, such as a liquid.
* The fluid on the floor was a harmless chemical.
在地板上的液体是无害的化学制品。
【fly】(1) to move through the air with wings, like a bird or airplane; (2) to travel in an airplane or flying vehicle.
* Birds fly high in the sky. (1)
鸟在天空中高飞。
* Walter will fly to Los Angeles tomorrow morning. (2)
沃尔特明天上午将飞往洛杉矶。
【fog】a mass of wet air that is difficult to see through.
* The fog slowed traffic for several hours.
雾使交通减慢在了几个小时。
【follow】(1) to come or go after; (2) to accept the rule or power of; (3) to obey.
* He asked us to follow him to his house. (1)
他要我们跟随他到他的家里去。
follow...to：跟随…到达某地
* He follows the teachings of the Roman Catholic Church. (2)
他遵循罗马天主教堂的教义。
Roman Catholic：天主教会的
Roman Catholic Church：天主教堂
* The official said he followed the orders of the President's lawyer. (3)
那个官员说他接受了总统律师的指示。
【food】that which is taken in by all living things for energy, strength and growth.
* He wanted to get food for hungry people.
他想要为饥饿的人们弄到食品。
【fool】(1) to make someone believe something that is not true; (2) to trick; (3) a person who is tricked easily.
* Her lies fooled a lot of people. (1)
她的谎话欺骗了许多人。
* He fooled people to get what he wanted. (2)
他愚弄人们以得到他想要的。
* Being tricked made him feel like a fool. (3)
被骗使他感到自己好象是一个傻瓜。
【foot】the part of the body that touches the ground when a person or animal walks.
* Her foot hurts because she stepped on a sharp rock.
她的脚受伤是因为她踩一块锋利的石块。
【for】(1) because of; (2) in exchange; (3) through space or time; (4) representative of; (5) to be employed by.
* He is famous for his work. (1)
他因他的工作而著名。
be famous for：因…而著名
* Give me one dollar for the book. (2)
这本书付给我一美元。
* They traveled for one hour. (3)
他们旅行了一小时。
* I speak for all people. (4)
我代表所有人说话。
speak for：代表…讲话，为…辩护
* She works for a computer company. (5)
她为一家电脑公司工作。
work for：受雇于，为…而工作
【force】(1) to make someone do something or make something happen by using power; (2) power, strength; (3) strength used against a person or object; (4) military power of a nation; (5) a military group.
* They forced him to go with them. (1)
他们强迫他和他们一起去。
* The bomb exploded with great force. (2)
炸弹带着强大的冲击力爆炸了。
* He used powerful force to lift the fallen tree from her body. (3)
他用强大的力量从她的身上抬起倒下的树。
* The President said he will use the full force of the country against foreign invaders. (4)
总统说他将使用国家全部的力量来反对外国入侵者。
* A Navy and Marine Corps landing force is on its way to the troubled island. (5)
海军和海军陆战队的登陆部队正在开往那座动乱的海岛。
Marine Corps：海军陆战队
landing force：登陆部队
【foreign】(1) of, about or from another nation; (2) not from one's own place or country.
* The United States has diplomatic relations with almost every foreign nation. (1)
美国与几乎每个外国的国家有外交关系。
* Foreign products seem to cost less than most products made here. (2)
外国产品的价格似乎比这里生产的绝大部分产品更低一点。
【forest】a place of many trees.
* New laws prevent companies from cutting all the trees in the forest.
新法律阻止公司（人们）在森林里砍伐所有的树。
prevent from：阻止，防止
【forget】to not remember.
* The man was in trouble because he forgot his wedding anniversary.
那个人遇到麻烦，因为他忘记他的婚礼周年纪念日。
【forgive】(1) to pardon; (2) to excuse; (3) to remove guilt.
* A pardon by the President forgives a criminal for the crime. (1)
总统的赦令宽恕了这个犯人犯的罪。
forgive for：原谅(某人)做了(某件错事)
* I forgive you for taking my car. (2)
我原谅你用了我的车。
forgive for：原谅(某人)做了(某件错事)
* Please forgive me for being late. (3)
请原谅我迟到。
【form】(1) to make; (2) to start; (3) to shape; (4) a kind.
* We formed a plan before starting the project. (1)
在开始工程之前，我们先形成一个计划。
form a plan：拟计划
* They formed a swim team. (2)
他们组成了一个游泳队。
* She formed the clay bottle with her hands. (3)
她用她的手塑造这个黏土瓶子。
* Swimming is a form of exercise. (4)
游泳是锻炼的一种类型。
【former】(1) earlier in time; (2) not now.
* At a former time, Philadelphia was the national capital. (1)
在从前，费城是国家的首都。
* His former wife lives across the street from him. (2)
他的前妻住在他对面的街道上。
【forward】(1) the direction in front of; (2) toward the front.
* The group with the flags was 10 meters forward of the rest of the parade. (1)
举着旗的团队在其余游行的队伍的前方10米处。
* The men stepped forward when the sergeant commanded, "Forward, march". (2)
当警官命令“齐步走!”时，那些人向前跨步。
【free】(1) to release; (2) not controlled by another or by outside forces; (3) not in prison; (4) independent; (5) not limited by rules; (6) without cost.
* He was freed at the end of the trial. (1)
审判结束后他被释放。
at the end of：在…结尾，在…末端
* For the first time, she felt free as a bird. (2)
她头一次觉得像鸟儿一样自由。
* He was a free man after being found not guilty. (3)
在被判决无罪后，他就是个自由的人了。
be found (not) guilty：被判决有(无)罪
* The United States is a free nation. (4)
美国是一个自由的国家。
* After his final day of studies, he was free from all the rules of school. (5)
在他结束学习的那天，他不受学校任何规定的束缚。
be free from：免于...，没有....的，不受......的
* The prize she won was a free ride in an airplane. (6)
她获得的奖品是免费乘飞机。
【freedom】the condition of being free.
* Many people in history have died for freedom.
历史上很多人为自由而死。
【freeze】(1) to cause or to become very cold; (2) to make or to become hard by cold.
* You will freeze unless you wear a coat. (1)
除非你穿上大衣，否则你会冻僵。
* She freezes food and stores it in her freezer. (2)
她把食物冷冻之后存放在冷库里。
【fresh】(1) newly made or gathered; (2) recent.
* His garden produces fresh vegetables every day. (1)
他的菜园每天产出新鲜蔬菜。
* The lawyer criticized the fresh evidence found by police. (2)
律师抨击了警察发现的新证据。
【friend】a person one likes and trusts.
* The two men have been friends for more than fifty years.
那两个男人做了50多年的朋友。
【frighten】to cause great fear.
* Loud noises frighten my daughter.
巨大的噪音使我女儿害怕。
【from】(1) having a person, place or thing as a beginning or cause; (2) at a place distant, not near; (3) because of.
* It is a message from the president. (1)
这是从主席那来的通知。
* The school is five kilometers from my home. (2)
从我家到学校有五公里。
* He is suffering from cancer. (3)
他因为癌症而痛苦。
suffer from：患(某种病)，受(某种病痛)折磨
【front】(1) the forward part; (2) the opposite of back; (3) the beginning; (4) the first part.
* The front of her house needs painting. (1)
她家房子的前面需要涂漆。
* She wanted to sit in the front of the bus, not in the back. (2)
她想座在公共汽车的前面，而不是坐在后面。
in the front of：在最前面，在最重要的位置
* They were at the front of the line waiting to buy tickets. (3)
他们在队的最前面等着买票。
be at the front：在前线，在前面
* He said the best part was toward the front of the book. (4)
他说这本书的精华在于它的开头部分。
【fruit】food from trees and plants.
* Much of the fruit fell from the tree.
很多水果从树上掉下来。
【fuel】any substance burned to create heat or power.
* Which kind of fuel do you use to heat your home?
你喜欢用哪种燃料来给房间供暖？
【full】(1) containing as much as a person or thing can hold; (2) complete.
* The gasoline tank is full. (1)
油箱满满的。
* He will spend the full week away from the office. (2)
他要离开办公室整整一周。
away from：远离
【fun】anything that is pleasing and causes happiness.
* The children had fun at the birthday party.
孩子们在生日庆祝会上很开心。
【funeral】a ceremony held in connection with the burial or burning of the dead.
* After the funeral, the President's remains were buried at Arlington National Cemetery.
葬礼之后，总统的骨灰葬在阿灵顿国家公墓。
【future】(1) time after now; (2) in the time to come.
* We can talk about it in the future. (1)
我们可以在以后谈论这事。
* All future meetings will be held in this room. (2)
所有未来的会议都在这间屋子里举行。