vacation n.度假，休假
The director is not here. He’s gone on vacation.主任不在这里。他去度假了。
vague adj.模糊的；含糊的
The confusing movie had a rather vague ending.这部令人迷惑的电影有一个非常含糊的结尾。
vain adj.①徒然的②自负的；爱虚荣的
He made a vain attempt to reach the drowning woman.他尝试接近那名溺水的女士，结果徒劳无功。
The vain man spent a lot of money on the latest fashions.虚荣的人花了许多钱来购买最新款的时装。
valid adj.有效的；有根据的，正确的
This coupon is valid until the end of the month.这张优惠券的有效期至月底。
valuable adj.贵重的；颇有价值的
Anne wore a valuable diamond ring to the party.安妮戴着一枚贵重的钻石戒指去参加聚会。
vanish vi.消失；灭绝
Dinosaurs vanished from the earth at the end of the Mesozoic Era.中生代末期，恐龙从地球上消失了。
variable n.变数，变量 adj.可变的，易变的
The variables of the laboratories doing the testing mean that the results cannot be relied on.实验室做实验时的变量表明，实验结果并不可靠
He soon learned that the moods of a young girl—happy one moment, miserable the next一can be as variable as the winds.他很快就知道了，少女的情绪就像风一样易变，时而高兴，时而悲伤。
variation n.变异；变种
Nectarines are avariation of peaches.油桃是桃子的变种。
various adj.各种的
The company, which has been exploring various means of expansion, has decided to open 10 more restaurants.这家一直在研究各种扩张方式的公司，已经决定再开10家餐厅。
vary v.呈现不同；改变，变化
Bill varied his writing style because he thought it was boring.比尔改变了写作风格，因为他认为之前的风格太无聊了。