ambient medium的用法和樣例：
例句
- When the hydrodynamic front reaches the ambient medium it acts like a fast-moving piston.
當流體力學(xué)波陣面抵達周?chē)橘|(zhì)時(shí)，它像一個(gè)運動(dòng)迅速的活塞。 - Then the magnetic connection between the cloud and the surrounding medium will be broken.
其時(shí)云和周?chē)橘|(zhì)間的磁聯(lián)系就終止了。
