Whereas an object's altitude and azimuth constantly change as the earth rotates, the RA/dec coordinates of a "fixed" body such as a star remain constant (ignoring long-term effects such as precession).
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Whereas JAXB USES a factory to construct new instances of an object class, Zeus USES a generated implementation class with prototyping.
JAXB使用工厂来构造对象类的新实例，而Zeus通过原型使用生成的实现类。
For example, the JMS binding is the transport protocol associated with an export, whereas the JMS object data binding converts the object message into the associated data object.
例如，JMS绑定是与导出关联的传输协议，而JMS Object数据绑定将对象消息转换为关联的数据对象。
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