upon the quiet的用法和樣例：
例句
- They decided to leave the town secretly.
他們決定秘密地離開(kāi)這個(gè)城鎮。 - Many people attended the meeting on the sly.
許多人秘密地參加了會(huì )議。 - She must have been having lessons on the sly.
她準是暗地里一直在上課。 - He's married but he has a girl friend on the side.
他雖有妻室，但暗地里還有一個(gè)女朋友。 - The child had been spirited away during the night.
那孩子在夜里被偷偷地帶走了。 - He black-marketed grain on the quiet.
他偷偷地做黑市糧食買(mǎi)賣(mài)。
