This paper points out four major problems to be solved in application.
本文指出了实际推广应用需要解决的四个主要问题。
The mechanics problems caused by the four major effects of nanomaterials were studied.
分析了纳米材料的四大效应所带来的力学问题。
Thirdly, it studies the major existing problems from four aspects: technological service, prevention service, material supply service and management service.
从技术服务、防治服务、物质供应服务和管理服务四个方面研究了存在的主要问题。
Thirdly, it studies the major existing problems from four aspects: technological service, prevention service, material supply service and management service.
从技术服务、防治服务、物质供应服务和管理服务四个方面研究了存在的主要问题。
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