Sv
[計] 單值, 狀態有效
??? 情景例句
We rely on the Earth for everyting we need to survive, so let's take care of it.
我們依賴地球獲取我們生存的一切東西，因此讓我們來細心呵護它。
Can I have a second-class one way ticket to Chicago,please?
請給我一張去芝加哥的單程二等票好嗎？
Then I added with a smile,
我微笑地接著說，