To calcify is to become hard, or to make something hard, because lime builds up in it. Lime here is the white mineral from limestone, not the green fruit.

To calcify is to become hardcalcify是指變硬 or to make something hard或讓某個東西變硬 because lime builds up in it因為裡面堆積了石灰 Lime here is the white mineral from limestone這裡的lime是石灰岩裡那種白色礦物質 not the green fruit不是那種綠色的水果

Doctors use this word when a soft part of the body slowly turns stiff and stone-like — a lump, a heart valve, even the soft spots on a baby's head as they close. Old pipes and remains can calcify too.

Doctors use this word醫生會用這個字 when a soft part of the body slowly turns stiff and stone-like當身體的某個軟組織慢慢變硬、像石頭一樣 a lump一個腫塊 a heart valve心臟瓣膜 even the soft spots on a baby's head as they close甚至嬰兒頭上的囟門在閉合的時候 Old pipes and remains can calcify too舊水管和遺骸也會calcify

Though actually, writers also stretch it: a habit or a rule “calcifies” when it goes stiff and will not change. That stretch belongs to essays and news, not to the science class.

Though actually不過其實 writers also stretch it作家也會延伸這個字 a habit or a rule "calcifies"一個習慣或規則會"calcify" when it goes stiff and will not change當它變得僵化、不再改變的時候 That stretch belongs to essays and news這種延伸用法屬於論說文和新聞 not to the science class不屬於科學課

The verb is not “add a calcium pill”; it is “turn hard with this mineral.”

The verb is not "add a calcium pill"這個動詞不是指「補鈣片」 it is "turn hard with this mineral."而是指「因為這種礦物質而變硬」