经过多年研究工作，观测技术已基本成熟。

Through the research work for many years, it is already ripe basically to observe technology.

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经过多年的原料和产品的研究，我觉得这是一个很好的产品！

After years of ingredient and product research, I feel this is an excellent product!

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他经过多年的研究，逐渐总结出了新的理论。

He has evolved a new theory after many years of research.

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经过多年的研究，他终于有所发现。

He made the discovery after many years of research.

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经过多年的研究，他逐渐总结出了新的理论。

He has evolved a new theory after many years 'research.

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海洋高压锅是经过多年的经验和研究…

The Marine Pressure Cooker is the result of years of experience and research in …

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海洋高压锅是经过多年的经验和研究…

The Marine Pressure Cooker is the result of years of experience and research in …

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