Dentiaskiascope
口腔科 X 线透视机
🗣️ 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？
Don't forget to write to me.
不要忘记写信给我。
I'm afraid the item you substituted didn't work.
你这代替品恐怕不能用。