In this case, a root class (upper-left corner in red) is where the problem originated.

在本例中，一个根类(左上角用红色标明的那个类)是问题的发源地。

youdao

In this case, a root class (upper-left corner in red) is where the problem originated.

在本例中，一个根类(左上角用红色标明的那个类)是问题的发源地。

youdao