... short time diffusion 短时间扩散 long time diffusion 长时间扩散 time diffusion model 扩散模型 ...
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长时间扩散退火可有效地提高粉末锻造钢的韧性。
Toughness of powder forging steel can be increased efficiently by diffusion annealing in longer time.
发现长时间扩散退火可显著提高粉末锻件的冲击韧性。
It is found that shock toughness of powder forging part can be increased obviously by diffusion annealing for long time.
有目的的人可以通过一座狭窄的桥，而植物和动物的缓慢扩散则需要一条像大陆一样的道路，而且需要很长时间才能使用。
Whereas purposeful men could make their way across a narrow bridge, the slow diffusion of plant and animals would require an avenue as a continent and available for ages at a stretch.
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