So, how to improve the using life and the working precision of the copper alloy is an important research project.
因此，如何提高铜合金的使用寿命和工作精度就成为一个重要的研究课题。
It is always an important research project to identify the formation mechanism and characteristics of flow pattern and the flow law.
认识流型的形成机理和特征以及流动规律一直是两相流领域的重要研究方向。
It becomes an important research project that how to use the service of the network and reduce the loss in the network information security.
如何尽可能的利用网络的服务，而减少因网络信息安全方面的损失是一个很重要的课题。
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