化学清理在国外的主要进展是，开发出了一些新型化学清理剂以及对渣泥和废水的处理技术。
Some new chemical cleaner and treatment technology for slag-mud and waste-water have been developed for chemical cleaning at abroad.
它们的目标是清理主系统的水，提供分离的停止，冷却的功能，水化学，装料及容量控制，补充水。
They are aimed at either cleaning the water in the primary system, providing separate shutdown cooling functions, water chemistry, charging and volume control, makeup water.
然而即使蚊子，也由于我们注意清理污水和喷洒化学药品就被制服了。
But even the mosquito has been subdued by attention to drainage and by chemical sprays.
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