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。
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。
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。
Blood testing has established that, compare with other draft breeds and based upon gene marker data, the Creams form a distinct group within the draft horses.
血液测试，建立与其他草案品种比较，并根据基因标记数据，膏草案马内形成一个独特的群体。
Results After 4 weeks and 8 weeks later, compared with the clinical marker, there are some alteration, and the treated group has more marked improvement.
结果两组患者的临床指标在治疗后4周、8周均较治疗前有明显改善，但治疗组较对照组改善更为显著。
The first group had their plumage colour enhanced with a marker pen.
第一组鸟的羽毛被用彩笔加强了色彩。
This morning group had much higher levels of an enzyme in their blood that is a marker of dying heart tissue than patients whose heart attack had occurred in the evening (between 6pm and midnight).
发现这一早晨组病人的血液中血液酶水平要比在晚上（下午6点到午夜）发病患者的高，这是造成心肌坏死的元凶。
This morning group had much higher levels of an enzyme in their blood that is a marker of dying heart tissue than patients whose heart attack had occurred in the evening (between 6pm and midnight).
发现这一早晨组病人的血液中血液酶水平要比在晚上（下午6点到午夜）发病患者的高，这是造成心肌坏死的元凶。
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