In March alone, 20, 000 units of the most popular model, the F5, were sold.

今年3月，就售出共20000辆最流行的F5。

youdao

How many units of the previous model have failed in the past two years?

在过去的两年里，以前的模式有多少单位未能成功？

youdao

How many units of the previous model have failed in the past two years?

在过去的两年里，以前的模式有多少单位未能成功？

youdao