Smth
abbr. 水木清華（Shui Mu Tsinghua）
??? 情景例句
At what time?
幾點？
When did you do homework?
你什么時候做家庭作業？
We want it to stay down the hole until we can lead it off in a controlled manner.
我們要讓石油留在井下，直到我們能用一種有控制的方法把它引上來為止。