Non-gratuitous

non [[nɔn]]

adv. 非, 不

gratuitous [ɡrə'tuɪtəs]

adj. 免费的，无偿的;无必要的;无故的，无理由的;

gratuit=grai感激，高兴+ous形容词后缀 → 无缘无故的； 免费的

Please don't worry.

请别担心。

He must needs go whom the devil drives.

势在必行。

Do you remember one afternoon ten years ago when I came to your house and borrowed a necklace of yours? Pierre, my husband, was working in a government office. We'd been invited to a ball at the palace so I needed to borrow some jewellery.

10年前的一个下午，我到你家借过一条项链，你还记得吗？我的丈夫比尔当时在政府的一个部门工作。我们被邀请参加一个宫庭舞会，所以我需要借一点珠宝首饰。