Optionality
n. 期权性风险
🗣️ 情景例句
That's another surprise.
这是另一个惊喜。
Sure. Here it is.
当然有。这就是。
She finished it at half past nine. She went to bed before a quarter to ten.
30 她完成了作业。她9：45之前上床睡觉。