The bulb is sometimes filled with an inert gas which permits operation at a higher temperature.

灯泡有时充入惰性气体，为的是能在更高的温度下工作。

youdao

The bulb is sometimes filled with an inert gas which permits operation at a higher temperature.

灯泡有时充入惰性气体，为的是能在更高的温度下工作。

youdao