When it began to rain, I had to flag down a taxi.

天开始下雨了，我不得不拦了一辆出租车。

youdao

If you must take a taxi, be sure the driver puts down the flag on the meter when you get in. Be sure there is nothing on the meter before he throws the flag.

如果你非得坐出租车，在上车时必须确定司机把计价器上的旗形牌放倒了，确定在他放倒旗形牌以前计价表上没有数字。

youdao

If you must take a taxi, be sure the driver puts down the flag on the meter when you get in. Be sure there is nothing on the meter before he throws the flag.

如果你非得坐出租车，在上车时必须确定司机把计价器上的旗形牌放倒了，确定在他放倒旗形牌以前计价表上没有数字。

youdao