Within a year I had built three top-50 apps in their respective categories.

在一年之内，我就做出了三个应用，它们在各自类别里都排进了前50名。

youdao

Within a year I had built three top-50 apps in their respective categories.

在一年之内，我就做出了三个应用，它们在各自类别里都排进了前50名。

youdao