Preengaging
vt. 预约, 先约
🗣️ 情景例句
Help! Help! I can't swim!
救命！ 救命！ 我不会游泳
Mike is already a junior.
迈克已经大学三年级了。
Suddenly, a middle-age lady got on the train and sat opposite Sally.
突然，一个中年妇女上了火车，坐在萨莉的对面。