求翻译：1、观色法。清洁达标的机油呈蓝色半透明状，机油中有水则呈褐色。使用含水的机油，当发动机运转一段时间后，机油呈醇白色，并伴有泡沫。是什么意思？

A concept of color method. Cleaning standards of the oil blue translucent like oil in the water is brown. Using the water content of the oil when the engine is running for some time, oil was alcohol white, accompanied by the foam.

Law 1, color. Clean up the oil, a blue translucent, oil, water, brown. Use water-based oil when the engine is running, and after a period of time, the oil is not white, and accompanied by a bubble.

1st, observes how things look the law.The clean standards machine oil assumes the blue color translucent shape, in the machine oil has Shui Zecheng to be brown.Use watery machine oil, after the engine revolves period of time, the machine oil assumes the mellow white, and is accompanied by the froth.

1, view color method. Clean standard oil blue translucent, there is water in the oil is brown. Use oil with the water, while the engine is running after a period of time, white oil is alcohol, and accompanied by bubbles.