根底: 1.(基础) foundation 短语和例子根底浅 have a shaky foundation; 根底很好 have a solid foundation2.(底细) ins and outs; cause; root 短语和例子知根底 know the ins and outs; get to the root of a matter; 追问根底 inquire i
深挖: heavy cut; high-cut; dig deep 短语和例子深挖敌人 ferret out the hidden enemies; 深挖根源 get to the root of the problem