| 例句 |
He was changing a light bulb when the ladder gave way.他在换灯泡时脚下的梯子塌倒了。He gave himself a mild electric shock while changing a light bulb.换灯泡时他被稍稍电了一下。Surely everyone knows how to change a light bulb!毫无疑问人人都知道怎么更换灯泡！Switch the light off before you change the bulb.换灯泡前把灯关上。Switch off the electric current before changing the bulb.换灯泡前先把电源切断。Halogen lamps give excellent service, but the bulbs are expensive to replace.卤素灯很耐用，但要换灯泡却非常昂贵。He's tall enough to change the bulb without getting on a chair.他个头够高，不用踩椅子就可以换灯泡。 |