英语语法分析

What he did was selfish and underhanded.

他所做的，是自私狡猾的。

But in softball, the pitcher must throw the ball underhanded.

但垒球的投手必须使用下手投球。

Unfortunately, it appears to be the result of some underhanded dealings.

不巧的是，这其实是地下交易的结果。