Net Head is derived from Total Head minus Head Losses.

　　凈頭是來(lái)自總目負水頭損失。

　　She happened to bring up who was behind the total head-shaving idea.

　　她碰巧告訴我是誰(shuí)給她出的這個(gè)剃光頭的主意。

　　This, of course, begs the questions: what is Total Head and what are Head Losses?

　　這當然，回避的問(wèn)題：什么是總團長(cháng)和水頭損失是什么？