cut down 砍倒
cause and effect 原因和结果
in danger 在危险之中
as a result of 作为......的结果
lead to 导致
die out 灭绝
act as 充当；担任
take turns 轮流
think of 想起
keep......from doing 使不做某事
end up with 最终成为
live a better life 过更好的生活
take measures to do sth 采取措施做某事
that is 也就是说
adapt to 适应
learn from 向......学习
first of all 首先；最重要的是
throw away 扔掉
make a difference 有关系；有影响
make a list of 列出清单
pick up 捡起
care about 关心
devote oneself to 献身于......专心于......
give a talk to sb.给......做报告
at present 目前
set free 释放
in the wild 在野外
be careful with 当心，小心
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