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。
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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