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1·Hybrid vehicles, such as Toyota's top-selling Prius, switch between a petrol engine and electric motor.

像丰田销量最好的普锐斯(Prius)这样的混合动力汽车，会在汽油发动机和电力马达之间切换。

2·Stores can be so small that they have to switch from selling sandwiches at lunchtime to selling ready-made suppers in the afternoon.

商店有时候很小，有时候中午卖三明治，到了下午就要快速转向销售简易晚餐。

3·The firm has decided to switch to another line of products, which are selling well.

公司决定转产制造销路好的产品。