dirty spot meaning in Chinese

（较大的）污点
污斑
污点

Of course you have to wash it ; you have to rub it briskly to clean the dirty spots
当然要洗，而且要用力搓，脏的地方才会乾净！
" the public was generally satisfied with the government s anti - mosquito measures , " dr tsang said , adding " the majority of the respondents ( 78 per cent ) were of the view that the government should continue to strengthen these measures , including cleaning of dirty spots and promotion campaigns
曾医生说：市民一般都满意政府的灭蚊措施。大部分受访者(百分之七十八)认为政府应继续加强这些措施，包括清理蚊子滋生黑点及推广宣传运动。