Synthane
六氟三氟甲氧基丙烷
🗣️ 情景例句
I'll get it. Hello.
我去开门。哈啰。
How much is a round-trip ticket to Beijing?
一张到北京的来回票要多少钱？
Were there any telephone messages for me while I was away?
我外出期间有我的电话吗？