Perfluorocyclopropane
全氟環丙烷
??? 情景例句
We'll set up our tents over there by the edge of the woods.
我們在林邊搭帳蓬。
I'm leaving tomorrow,but I haven't packed my suitcases yet.
我明天將離開，但是我還沒收拾好行李。
They have to work hard to support their family.
他們必須努力工作來支持他們的家。