A switch is a small control for an electrical device which you use to turn the device on or off. 开关
verb [vt. 及物动词] （用开关）打开，关闭；（使）改变，转变；交换，调换（switch 的现在分词）
It's so confusing switching to a new system. 转换到新系统会令人很困惑。
- switching 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 42 Modern cavemen
- 网友用 “Switching” 造句精选
- Do you remember switching the lights off before we came out? 你记得我们出来之前关灯了吗？