A number of essential classes implement JTC.

一些基本的类实现了JTC。

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JTC allows reference to all objects with a consistent type and behavior.

JTC允许引用所有具有一致类型和行为的对象。

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Ensures that each JTC implementation is expected to return all the JTC objects it creates.

它确保每个JTC实现都能按预期那样返回它所创建的所有JTC对象。

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Changes in perception may be needed as JTC are now looking into heading downwards for spaces housing people -- rather than oil -- in the form of an underground science city.

CNN: Why Singapore is putting its oil back into the ground