The weak reference from the long-lived object to the short-lived object is kept long after the short-lived object has been destroyed.
在短周期对象销毁后，长周期对象对短周期对象的弱引用依然会长久保留下来。
Whether "the law of social history can be both created and destroyed" or "can be neither created nor destroyed" has been a long debated issue in our academic field.
“社会历史规律能不能被创造和消灭”，这是我国学术界长期争论不休的一个问题。
The shale roof-made of the sediment that destroyed the forest so long ago-is cracking and flaking off now that the coal below it has been removed.
页岩层顶部是由远古时候掩埋森林的沉积物构成。由于埋藏其下的煤已经被挖走，所以这些页岩有开裂和剥落现象。
A cultural relic is something that has survived for a long time, often a part of something old that has remained when the rest of it has been destroyed.
文化遗迹是一些存留很长时间的东西，常常是其他部分已被毁掉而其中一部分得以保存的古老的东西。
A cultural relic is something that has survived for a long time, often a part of something old that has remained when the rest of it has been destroyed.
文明遗址是一些存留很长工夫的东西，常常是其它部分已被毁掉而其中一部分得以保存的陈旧的东西。
A cultural relic is something that has survived for a long time, often a part of something old that has remained when the rest of it has been destroyed.
文明遗址是一些存留很长工夫的东西，常常是其它部分已被毁掉而其中一部分得以保存的陈旧的东西。
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