Hows your boxing practice going ?

你的拳击练习怎样?

Hows your head this morning , a little bit of a hangover ?

今早头脑怎么样，还有点醉意吗？

Hows it coming with the little carpenters ?

你的小木匠们做的如何?

L don 't care about the hows or the whys .

我不关心怎么做和为什么做。

Science : " always be prepared to explain the hows and whys . "

科学：“时刻准备解答‘怎样做’和‘为什么’。”