If your design includes empty interfaces that types are expected to implement, you are most likely using an interface as a marker, or a way of identifying a group of types.

如果你的设计包含一个空的接口，并且希望一些类型实现这个接口，你很可能希望使用这个接口作为一个标记来标示一组类型。

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If your design includes empty interfaces that types are expected to implement, you are probably using an interface as a marker or a way to identify a group of types.

如果您的设计中包含类型需要实现的空接口，可以将接口作为标记或者作为标识一组类型的手段使用。

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Neuronal specific marker proteins did not express in the control group.

对照组未见神经细胞标记蛋白表达。

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The first group had their plumage colour enhanced with a marker pen.

ECONOMIST: Male birds cannot afford to relax their standards