Upperbound
上界
🗣️ 情景例句
Guess what I just found out.
你猜我刚知道了什么？
One of the real pluses of this product is that it is of very high quality and of compact size.
这种产品的真正优点之一就是高质量和小体积。
I had no intention of buying one,
我原来并不打算买一个，