Pexin
凝乳酶
🗣️ 情景例句
Are you sending it by regular or by speed?
你要寄平信还是快递？
Do you intend to finish before you leave?
你在出去以前要把它做完吗？
Precautions of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the pot-holer.
作出这样的准备是必要的，因为无法预见到洞穴探险者究竟会遇到什么性质的困难。