gas cylinder的用法和樣例：
例句
- Two other stores of the supply store chain, Maksidom, were evacuated after workers discovered gas ampoules with what appeared to be timing devices.
該連鎖賣場內的另外兩個商店裡，在工人們用形似定時器的裝置發現了數支氣筒之後，人群得以及時疏散。 - Repeatedly put the gas syringe in a beaker of water with varied temperature for some time, in order to make the gas temperature is equal to the water temperature.
重複把氣筒放入盛有不同溫度的水的燒杯內，放置一段時間，令氣體溫度與水溫相同。
