Message in Chinese (Simplified) (中文(简体))
“<var>X</var>”已经具有子级且无法添加“<var>Y</var>”。“<var>X</var>”只能接受一个子级。
Unlocalized message
'<var>X</var>' already has a child and cannot add '<var>Y</var>'. '<var>X</var>' can accept only one child.
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