There are two ways to create a reference from an old object to a young object.
有两种创建从老对象到年轻对象的引用的方法。
Well, adding that, and running "make clean" to get rid of the old object files.
好的，现在添加这个选项，并运行“makeclean”删除旧对象文件。
Whenever text is to be appended to or deleted from a String, a new object is created under the covers and the old object is discarded. Hence we prefer this.
无论何时将文本附加到String或从中删除，实际上都将创建一个新对象，并将旧对象丢弃。
Either one of the references contained in an old object is modified to refer to a young object, or a young object that refers to other young objects is promoted into the older generation.
要么是将老对象中包含的引用修改为指向年轻对象，要么是将引用其他年轻对象的年轻对象提升为更老的一代。
In the object model, creating a new object, destroying the old object, sending messages, and replying to messages constitute the basis of the OOP computational model.
在对象模型中，产生新对象，旧对象销毁，发送消息，响应消息就构成OOP计算模型的根本。
Also, when possible, the actual operation is performed in-place, meaning that rather than creating a new object and assigning that to the target, the old object is modified instead.
而且，只要可能，实际的操作是就地进行的，意思是并非创建一个新对象然后将其赋值给目标，而是修改老的对象。
A 30-year-old object believed to be the youngest black hole ever seen, is a remnant of SN 1979c, a supernova in the galaxy M100, shown here, approximately 50 million light-years from Earth.
一个三十岁年龄的天体据信是人类观察到的最年轻的黑洞，它是M 100星系里名为SN 1979c的超新星的余烬，距离地球大约5000万光年，如上图所示。
The old object model not only led to the above-mentioned problems but also led to fundamental problems that prevented implementing some additional features on top of the existing object model.
旧的对象模型不仅仅导致上面提及的问题，而且阻碍了在这个已经存在的对象模型上实现一些附加的特性。
The old object model not only led to the above-mentioned problems but also led to fundamental problems that prevented implementing some additional features on top of the existing object model.
旧的对象模型不仅仅导致上面提及的问题，而且阻碍了在这个已经存在的对象模型上实现一些附加的特性。
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