With the market changing so quickly, our export commodities must be constantly upgraded to have a competitive edge over those of our rivals.
由于市场形势千变万化，出口产品必须不断地更新换代，胜人一筹。
The performance of diffusion pumps hasbeen improving greatly with their construction upgraded quickly since the factor was proposed.
这个系数的提出促进了扩散泵性能有很大的提高，结构也有很大的改进。
The performance of diffusion pumps hasbeen improving greatly with their construction upgraded quickly since the factor was proposed.
这个系数的提出促进了扩散泵性能有很大的提高，结构也有很大的改进。
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