在下图中，我们打算从模型中彻底删除一个元素(我们右键单击的元素)，不只是在描述该元素的图中。

In the following figure we're about to delete an element (the one we right-clicked on) from the model entirely, not merely from a diagram where it's depicted.

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也许您已经犯了传统的错误，即从模型而不只是当前图中删除元素。

Perhaps you've made the classic error of deleting an element from the model instead of merely from the current diagram.

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