We've lost touch with the act of making, repairing, and upgrading physical objects.
我们已经丧失制作、修理和改进实物的能力。
The physical properties of upgrading heavy oil were analyzed. Temperature dependence on the viscosity was reduced, and the change of viscosity with temperature was decreased.
对鲁克沁改质稠油的物性进行了分析，稠油粘度对温度的依赖性降低，随温度变化缓慢；
The physical properties of upgrading heavy oil were analyzed. Temperature dependence on the viscosity was reduced, and the change of viscosity with temperature was decreased.
对鲁克沁改质稠油的物性进行了分析，稠油粘度对温度的依赖性降低，随温度变化缓慢；
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