modulator tube的用法和樣例：
例句
- The Bunsen flame becomes smaller, then burns in the burner tube, and finally goes out rapidly.
本生焰縮小，然后在燈管中燃燒，最后迅速熄滅。 - This current races through the lamp's glass tube, which is filled with a mixture of gas and mercury vapor at low pressure.
電流流經(jīng)燈管的電子管時(shí)，那里充滿(mǎn)了一種混合氣體及貢蒸汽處于一種低壓狀態(tài)。
