In the angiosperm the seeds are wrapped in an additional layer of covering.

被子植物的种子被另一层覆盖物包裹着。

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This provides an additional layer of security.

这提供了额外的一层安全性。

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However, an additional layer of semantics comes into play with XML.

然而使用XML时会产生一个语义的附加层。

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Still, until a decision is made, some parents and school officials bemoaned the additional layer of stress.

WSJ: Admissions Deadline Confusion

The would offer an "additional layer of scrutiny" and protect the home secretary from accusations of political interference, she argued.

BBC: Government defeated on Crime and Courts Bill

As the stock continues to stagnate beneath trendline resistance, these out-of-the-money calls could provide an additional layer of options-related pressure.

FORBES: First Solar Looking Fine But Not JASO, SunPower