Biuniqueness
双向单一性
🗣️ 情景例句
Here's $ 1000 for the trip. Use some of it for stamps.
这里是1000美元，给你当旅费。要把一些用来买邮票啊！
Doesn't that garbage smell nasty?
你没有闻到那垃圾有股怪异的气味？
She got up before 7 o'clock in the morning, and quickly washed her hands and face.
00以前起床，快快地洗手洗脸。