减少活动英语

As it's colder,people reduce the time of outdoor activities gradually.

解释雾霾Haze is air pollution in which is mixed up with dust, smoke and other dry particles ,and it obscure the clarity of the sky and interacts with the natural environment. 雾霾原因This kind of air pollutant come from a variety of natural and manmade sources. Natural sources can include windblown dust, and soot from wildfires. Manmade sources can include motor vehicles, and industrial fuel burning, and manufacturing operations. The one of the main cause that touches off haze is manufacturing operations. Many factories were over measure produced the smog that had over the standard and the smog seriously influence the air become air pollution.雾霾危害The components that make up haze may have negative effect on people's health especially that of the children and the elderly. Also not excluded are those who have certain diseases such as asthma, allergy, and pneumonia and lung disease. Workers working in the open air have a high risk in their health.解决方法美国进口普卫欣天 猫One of effective solutions to help eliminate haze is to make some chemistry changes during the manufacturing process,so it could reduce harmful emissions which are produced by manufacturing operations tianmaoUSApuweixin

go 的过去分词，是走、离开的意思。艾薇儿有首歌叫 when you were gone，意思就是 当你离开时

我觉得我们中学生在学习紧张的时候不应该减少课余活动。英语：I think that as middle school students we should not reduce our extracurricular activities even in the intensive stud.