Gdt
气体放电管（gas discharge tube）
🗣️ 情景例句
She is indifferent to other people's suffering.
她对别人的痛苦漠不关心。
I'll call you back.
我回电话给你。
I grew a beard during the trip.but I shaved it off when I came home.
我在旅行时留了胡子，但我回到家时就把它刮了。