Thiylation
引入含硫基
??? 情景例句
We've known each other since we were children.
我們從小就認識。
He that will thrive must rise at five.
五更起床，百事興旺。
The silence was suddenly broken when a large car, with its headlights on and its home blaring, roared down the arcade.
寧靜突然被打破，一輛大轎車亮著前燈，響著喇叭，呼嘯著沖進了拱廊街，