重点讲解：
1. make sense
（行为方式）有道理，合乎情理；
eg. It makes sense to look after yourself.
自己应该照顾自己。
eg. The project should be reappraised to see whether it made sound economic sense.
该项目应重新评估，以确定其是否可以产生良好的经济效益。
2. not at all
（用于否定句、条件句、疑问句等的句末）全然，一点，根本，究竟；
eg. Robin never really liked him at all.
罗宾从未真正喜欢过他。
eg. There were no roads at all.
那儿根本没有公路。
3. draw the line
划定底线；不能容忍；反对；
eg. You have to know what's what and when to draw the line.
你必须搞清状况以及自己的底线。
eg. I draw the line when it comes to lending money to friends!
当朋友向我借钱时我会划定最后界限。