Biochemistry is the science that looks at living things through chemistry. It asks what molecules are doing in a cell: how food becomes energy, how DNA is copied, how a vitamin helps a reaction, why a poison stops one.

Biochemistry生物化學 is是 the science that looks at living things through chemistry一門用化學的角度來看生物的科學。It它 asks what molecules are doing in a cell問的是分子在細胞裡在做什麼：how food becomes energy食物怎麼變成能量、how DNA is copied DNA怎麼被複製、how a vitamin helps a reaction維生素怎麼幫助一個反應、why a poison stops one為什麼毒素會讓反應停下來。

In school it sits between biology and chemistry, and you need a little of both. Doctors use it every day without always saying the long word — a hospital “biochem” blood panel is biochemistry at work.

In school在學校裡 it sits between biology and chemistry它介在生物和化學之間，and you need a little of both兩邊你都需要懂一點。Doctors use it every day醫生每天都在用它 without always saying the long word只是不一定會講出這個長長的名字——a hospital "biochem" blood panel醫院的「biochem」血液檢驗 is biochemistry at work就是生物化學在實際發揮作用。

Though actually, the tidy dictionary makes it sound like one neat box. In real labs the edges blur into molecular biology, physiology, and nutrition. People still say biochemistry when they mean “the chemistry of the body or of cells”.

Though actually不過其實，the tidy dictionary makes it sound like one neat box字典的定義會讓它聽起來像一個整整齊齊的盒子。In real labs在真正的實驗室裡 the edges blur into molecular biology, physiology, and nutrition界線會模糊，跟分子生物學、生理學、營養學都混在一起。People still say biochemistry大家還是會說biochemistry when they mean "the chemistry of the body or of cells"來指「身體或細胞的化學」。

It is a formal school-and-lab word; in casual talk someone might just say “body chemistry” and be understood, if not precise.

It is它是 a formal school-and-lab word一個正式、學校和實驗室會用的字；in casual talk在平常聊天時 someone might just say "body chemistry"有人可能就直接說「body chemistry」 and be understood, if not precise也能讓人聽懂，雖然不夠精確。