Fdx
[计] 全双工
🗣️ 情景例句
How long will it take for my mail to reach its destination?
我的信件到达目的地要多久？
If I have enough money,I'm going to take a trip abroad.
如果我有足够的钱，我将在国外旅行。
What's in that cave?
岩洞里会有什么？