J-12 fighter is the first jet fighter designed and produced all by Chinese technology itself.

歼-12轻型战斗机是我国第一种完全依*本国技术力量进行设计和制造的喷气战斗机。

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This work must have been done at the first jet, for it has a certain spontaneity.

这幅作品带有某种自发性，它一定是出于一时冲动而完成的。

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This work must have been done at the first jet, for it has a certain spontaneity.

这幅作品带有某种自发性，它一定是出于一时冲动而完成的。

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