She covers her selfishness with a varnish of good manners.
varnish is you paint it with varnish, you don’t want others to see it.
The security forces were doing all they could to thwart terrorists.
thwart is you prevent them from doing something.
The balsam pear is very bitter, it is better for losing weight goal.
balsam pear is a bitterful vergetable.
原文：https://www.cnblogs.com/zhulinmails/p/12262431.html