Backflooding
地下水逆流
??? 情景例句
And Michigan needs a touchdown. Michigan
Michigan隊需要達陣得分。
Example is better than precept.
言教不如身教。
I'm not going to any.I need some fresh air, so I'm going out for a walk.
我哪個報告都不去聽。我需要一些新鮮空氣，因此我要出去散步。