Flashtron
气体放电断电器
🗣️ 情景例句
How long will this letter take to get there?
这封信需要多长时间到那儿？
Come to see me tomorrow if it is convenient to you.
你如果方便的话，明天来看我。
My holidays passed quickly, but I did not send cards to my friends.
假期过得真快，可我还没有给我的朋友们寄过一张明信片。