Preknock
预爆震
🗣️ 情景例句
I'd better unpack.
我还是先把行李打开吧。
A new broom sweeps clean.
新官上任三把火。
and the search for oil has done more to improve deep drilling than any other mining activity.
寻找石油比其他任何采矿业对改进深孔钻探作的贡献都要大。