Alluviums
n. [地质] 冲积层, 冲积土
🗣️ 情景例句
English is the language of aviation.
英语是航空语言。
Constant dropping wears away a stone.
滴水穿石。
why have we had no visitors from outer space yet?
那么我们为什么还未见到外层空间来访的客人呢？