英语学习·日积月累-121_日积月累

absent-mined
心不在焉的 

例句：
the absent-minded professor put salt in his coffee and sugar on his egg.
那位心不在焉的教授把盐放进了咖啡而把糖加进鸡蛋里。

turn one's back on / upon...
背弃……， 抛弃……
 
例句：
one should never turn his back on his home country.
一个人永远也不能背弃自己的祖国。

nothings the matter.
一切正常，没问题 
　　
对话：
a: it's too quiet today. is there anything wrong?
b: nothings the matter. it's just because everybody is too tired to talk.

a：今天真是太安静了，出什么事了吗？
b：没什么，只是因为大家都太累了，不想说话。