进来帮我翻译几个句子..谢谢

1.I don't know who broke the glass.
2.As is known to all, sports are beneficial to health.
3.As we all know, China is a developing country.
4.Don't look down upon us inferior students.

1、I don't know who broke the window
2、As we all know that exercise is good to health
3、It is well know that China is a developing country
4、Don't look down upon our poor students

I don't know that who broken windows.
As everybody knows that sports is good for healthy.
As everybody knows that China is a developing country.

i do not know who broke the glass
as si known sport is beneficial to health
as is known china is a developing country
look down upon 是瞧不起的意思

1I don't know who broke the glass
2Well-known sports are beneficial to the health
3It is known to all that China is a developing country
4