Nucleostratigraphy
核子地层学
🗣️ 情景例句
They are expecting their first child.
他们在怀他们的第一个小孩。
I don't think you'll have any difficulty in pushing sales.
我认为你推销时不会有任何困难。
When, for example, a customer first opens an account,
比如，储户首次在银行开户时，