Navigation leaves the containing element when an edge is reached.

当到达边缘时，导航会离开包含元素。

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The width the column should occupy as a percentage of the width in the containing element.

列在包容元素中应占用的宽度的百分比。

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A containing element is called a parent, and the elements inside are called child elements or children.

包含元素叫做父亲(parent)，被包含在里面的元素叫做孩子(child或children)元素。

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IAEA-led team was fanning out in western Georgia in search of the remaining two of a batch of eight abandoned devices containing strontium-90, another radioactive element, which had been used in generators for communication stations.

ECONOMIST: How dirty bombs are made, and what they can do