评论
打印
1.Most of us learn at school that warm air rises and cool air sinks.
sink 下沉
It lives and it dies and then it sinks and it sinks to the bottom.
它生存，死亡，然后下沉，下沉到底部。
2.Another researcher, Seth Seidel,said more research is needed to find out the effects rising cool air has on climate change, and on its impact on curbing the effects of global warming.
curb 抑制
Hunger and extreme poverty curb human potential in every possible way.
饥饿与赤贫会百般抑制人类的潜能。
