Underground activities
[法] 地下活动
🧩 词语组成解析
n. （activity复数形式）活动；活动区；活动性
🗣️ 情景例句
Richard! Welcome! Good luck tonight! Richard
欢迎 祝你今天晚上好运
I answer telephones and do some typing.
我接电话和打字。
it is quite reasonable to regard the sea floor as the basic form of the crust of the earth,
因此完全有理由把海床看作地壳的基本模壳，