Anthracitous
a. 含无烟煤的
🗣️ 情景例句
During that time
在那一小时
Fighting one's own.
起内哄。
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。