Polychlorparaffin
多氯化石蜡
🗣️ 情景例句
She's coming over this morning to help me with my math.
她今天早晨要过来帮我补习数学。
It is no good hen that cackles in your house and lays in another's.
这样的母鸡可不好：在你家里咯咯叫，却到别家去下蛋。
'You must give up fishing!' my friends say.
“你可别再钓鱼了！”我的朋友们说，