For each child, this method is called twice: once for each (X, Y) dimension.

对于每个child，该方法被调用两次：每个(X, Y)维调用一次。

youdao

For each child, this method is called twice: once for each (X, Y) dimension.

对于每个child，该方法被调用两次：每个(X, Y)维调用一次。

youdao