Boundary pillar
[法] 界标
🧩 词语组成解析
🗣️ 情景例句
Marketing promotion.
市场推广。
He is wise that knows when he's well enough.
知足的人是聪明的人。
We want it to stay down the hole until we can lead it off in a controlled manner.
我们要让石油留在井下，直到我们能用一种有控制的方法把它引上来为止。