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。
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