Undergrounding
(underground 的现在分词) n. 地下, 地铁, 地道, 秘密活动\\na. 地下的, 秘密的\\nadv. 在地下, 秘密地
🗣️ 情景例句
China is implementing a family planning policy.
中了在实施计划生育政策。
A tree is known by its fruit.
观其行而知其人。
John seldom gets together with his friends.
约翰很少与朋友聚在一起。