Ultraacoustics
超声学
🗣️ 情景例句
That's the back of Pete Waters's place.
那就是Pete Waters住处的后面。
All things are difficult before they are easy.
凡事都是先难后易。
We felt sure that sooner or later a stone would rip a hole in our petrol tank or damage the engine.
我们想念迟早会飞起一个石块把油箱砸开一个窟窿，或者把发动机砸坏。