We see that UnitsSystem is a sealed case class with no attributes.

我们看到，UnitsSystem是一个密封的case类，没有属性。

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Before the formal vacuum-assisted grouting, we should test the sealed case of the pore.

在正式真空辅助压浆前，测试孔道密封情况。

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Tea contains a variety of substances beneficial to human health, but only in dark, sealed case, can be well preserved.

茶叶含多种有利于人体健康的物质，但只有在避光、密封的情况下，才能得以很好地保存。

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But be aware that the two lowest-priced models, the heavily promoted Classic and Classic II, can accept less memory than the others and come in a sealed case that complicates memory expansion.

WSJ: Here's How to Survive Shopping for a PC

This could have sealed the case for the Hobbit as a new species, rather than a modern human pygmy or diseased individual - as some researchers have suggested it is.

BBC: NEWS | Science/Nature | Team widens search for 'Hobbits'

T. economist, may have sealed the case with a model showing that, without a mandate, Romney would insure a third of the people at two-thirds of the cost of doing it with a mandate.

NEWYORKER: Romney��s Dilemma