Ineeterminacy
不定性
🗣️ 情景例句
Do we have to pre-book tours, or can we get them on site?
我们必须预定行程， 还是到那个地方再说？
It's a classic!
真是经典！
Check the prices before you decide whether to buy one.
先把价格核对一下，再决定该不该买。