Ectohumus
[地质]外腐殖质
🗣️ 情景例句
Good. Can we sign them right away?
好的。我们现在可以签合同了吗？
The plate is dirty, Would you bring me a clean one, please?
这碟子是脏的，请你拿个干净的给我。
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。