Riprapping
抛石
🗣️ 情景例句
That's a pretty good salary.
那待遇很好。
He's a cook.
他是厨师。
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。