means that your message has been sent from your device

意味著你的資訊已經從你的設備上發送出去了

but it has not been received

但還沒有收到

by the person you are messaging yet.

你所發資訊的人還沒有。

A second gray check mark

第二個灰色複選標記

means that your message has been delivered

表示你的資訊已經送達

and received on the recipient's device.

並在收件人的設備上接收。

When the two check marks turn blue,

當兩個複選標記變成藍色時。

that means your message has been read

這意味著你的資訊已被閱讀

by a recipient with read receipts turned on.

由一個開啟了閱讀收據的收件人提供。

Some people have read receipts turned off.

有些人把閱讀收據關閉了。

If that's the case, they could have read your message,

如果是這樣的話，他們可能已經閱讀了你的資訊。

even if the check marks remain gray.

即使複選標記仍為灰色。