🗣️ 情景例句
Are you sending it by regular or by speed?
你要寄平信还是快递？
He is proud of his achievement.
他为自己取得的成就感到骄傲。
it is quite reasonable to regard the sea floor as the basic form of the crust of the earth,
因此完全有理由把海床看作地壳的基本模壳，