Before you leave the lab, make sure the electricity is turned off and the windows are shut.
你们离开实验室前,务必要关上电源,关好窗户。
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.