High viscosity indexes resist thinning down of the oil at elevated temperatures.
高黏度指数防止黏度随温度上升而变稀。
The population of my home town is thinning down now that so many people are going to the cities.
由于冼多人流向城市，我家乡的人口越来越少了。
The reasons and countermeasures for mother liquor holding tank wall thinning down of high density polyethylene device were analyzed in this paper.
本文从大庆石化公司高密度聚乙烯装置的生产实践出发，对造成母液储罐罐壁减薄的原因进行了分析，并提出了相应的对策。
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