Upperbound
上界
🗣️ 情景例句
A stitch in time saves nine.
亡羊补牢，犹为未晚。
I'm not rich. I wish I didn't have to pay the fine.
我不是富有人家，但愿不必交罚款。
I am not sure such data does exist.
我不确定是否有这样的资料存在。