cleaning: n.1.清洁法；扫除；清洗，洗涤；(种子的)清选。2.〔常 pl.〕(牛、羊等的)胞衣。3.【林业】除伐。4.〔pl.〕垃圾。5.〔口语〕(比赛等的)惨败，输光。6.〔口语〕巨额利润。短语和例子a general [thorough] cleaning大扫除。 take a cleaning (球队等)惨败。
cleaner: n.1.清洁工人；(干洗)洗衣工人。2.洗衣店(老板)。3.除垢器。短语和例子a lower cleaner【纺织；印染】下绒辊。 take sb. to the cleaners 〔俚语〕把(某人)钱财骗光，使输光。
Air - duct installation method of clean air - conditioning 净化空调风管安装方法
2.
Discussion on assessment method of cleaner production index system 清洁生产指标体系的评价模式探讨
3.
Method of cleaning long compressed - gas pipe line between zhengzhou and yima 郑州煤气长输管道的通球清管置换方法
4.
The bioventing is one of the most effective methods of cleaning petroleum contaminated soils 摘要处理石油污染土壤的诸多方法中，生物通风法是一种很有效的治理方法。
5.
It doesn t justify that we pay no attention to oral hygiene and it is only a matter of methods of cleaning our oral cavity 这些都说明并不是我们不讲卫生，而是清洁方法有问题，在很大程度上我们并不了解牙的
