The Panel itself has x and y coordinates.

Panel本身具有x和y坐标。

youdao

That element is itself a list, so the second indexing ([y]) returns one of the nested list's elements.

该元素本身也是一个列表，因此第二个索引操作([y])返回嵌套列表的元素之一。

youdao

That element is itself a list, so the second indexing ([y]) returns one of the nested list's elements.

该元素本身也是一个列表，因此第二个索引操作([y])返回嵌套列表的元素之一。

youdao