混凝土需要加入大量的掺和物来降低混凝土的成本，同时也改善了混凝土的性能。

To reduce the cost and improve concrete performance, massive admixtures were needed to be added to the concrete.

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设计了一个根据激光衰减的新方法，用来准确地测量相分离，从而测量有和无功溶剂的汽油-甲醇掺和物的水容忍度。

A new method based on laser attenuation was devised to accurately measure the phase separation and, in turn, the water tolerance of gasoline-methanol blends with and without cosolvents.

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