另一些人则通过已经使用多年的卡片来讲，通过磨损的边缘来判断。

Others lectured from cards that had served for years, to judge by the worn edges.

youdao

另一些人则通过已经使用多年的卡片来讲，通过磨损的边缘来判断。

Others lectured from cards that had served for years, to judge by the worn edges.

youdao