21. walk through a rainforest步行穿越热带雨林
22. see the feeding of animals看到给动物喂食，watch the dolphin show观看海豚表演 (p65)
23. hunt for their own food＝look for their own food＝search for their own food自己寻找食物
24. make medicine制药，make medicine from their bones make medicine from…用…制药
25. kill people for fun杀人取乐，kill…for fun杀…取乐 (p68)
26. loss of living areas没有居住场所loseloss丧失；损失；丢失
〈知识链接〉①mourn the loss of Audrey Hepburn
②loss of blood/sleep/self-control失血/失眠/失去自制
27. have very good eyesight, hearing and smell视觉、听觉、嗅觉灵敏 (p69)
28. be friendly towards/to each other彼此友好
29. have no home or food没有家也没有食物，or用于否定句中，意思是“和”。
〈知识链接〉There’s no air or water on the moon, so there’s no life there.
30. buy clothes made of animal fur购买兽皮制的衣服
〈知识链接〉made of animal fur过去分词短语作后置定语，如：a boy called Tom。过去分词作定语时放在所修饰词的前面，如：a fallen leaf, an unknown village。
31. lose one’s life/lives失去生命；丧生 注意life、lives的单复数形式变化
〈知识链接〉⑴In order to put out the big fire some firemen lost their lives.
⑵They’re willing to lose my life for their country.
32. someone else别人someone else’s别人的 (注意：不能写成someone’s else)
33. continue to destroy forests to build roads继续毁坏森林来修筑公路
〈知识链接〉continue to do, continue doing, go on with, go on doing, go on to do 继续做某事
continue是及物动词，continue doing sth＝go on doing sth其间没有中断，continue to do sth＝go on to do sth＝go on with sth＝continue sth其间有中断
①We continued working until late into night.我们连续工作到深夜。(中间无中断)
②He continued his talk after the rest.休息后他继续作报告。(中间有间断)
③Go on with your work.继续干你的活。(中间有间断)
④She was soon out of breath, but she continued running.很快她累得上气不接下气，可她继续跑.
⑤To be continued.未完待续(常用于故事连载)，continuecontinuous(无间断地)连续的
34. make new farmland from forests把森林开垦成新的农田
35. make/earn money赚钱 make/earn a lot of money赚许多钱
36. have only one or two babies at a time一次只生一两个熊猫崽 (p71)
〈知识链接〉⑴at a time一次；每次 ⑵at one time曾经 ⑶at times＝sometimes有时候
〈用法拓展〉sometime(将来的)某时，some time一段时间，sometimes有时，some times几次/倍
37. keep taking the land继续攫取土地
〈知识链接〉keep doing sth不停地做某事，反复地做某事。强调某个动作多次反复地发生。
“Will it be a success?”I kept asking myself.
〈用法拓展〉⑴keep on doing sth反复做某事(动作之间有间隔)
After class I found it a bit difficult to study in class because I kept on thinking about the match in the afternoon.
⑵keep sb doing sth老是让某人做某事
I’m sorry to have kept you waiting for so long.对不起，让你久等了。
⑶keep sb from doing sth阻止某人做某事＝prevent/stop sb from doing sth
The snowstorm kept them from coming to school on time.
38. walk upright直立行走，move around in the daytime白天四处走动move around the house (p72)
39. ⑴the heavy snow大雪，类似的有：the heavy rain大雨 ⑵lose homes失去家园 (p73)
〈知识链接〉snow heavily/hard下大雪，rain heavily/hard下大雨
词汇解析
1. kangaroo复数：kangaroos , bamboo复数：bamboos
以o结尾的可数名词变为复数时，通常遵循以下三种规则：
⑴以“元音字母＋o”结尾的名词加-s, 如：kangarookangaroos , bamboobamboos,
zoozoos, radioradios, cuckoocuckoos(杜鹃，布谷鸟), rodeorodeos(牛仔竞技比赛)
⑵以“辅音字母＋o”结尾的名词加-es, 如： heroheroes, potatopotatoes, tomatotomatoes, NegroNegroes(黑人), echoechoes(回声)
⑶有些“外来词”虽以“辅音字母＋o”结尾，但只加-s,如：tobaccotobaccos(烟草), photophotos, pianopianos, solosolos(独唱，独奏；单人表演)
2. 本单元动物名词：zebra, lion, bear, polar bear, tortoise (turtle海龟), giraffe, fox, camel, monkey, wolf, dolphin, giant panda, squirrel, tiger, snake, snail, insect, dragonfly蜻蜓
3. female女性的；雌性的 male男性的；雄性的 e.g. —What’s your sex? —Male/female.