教室里要保持干净和安静,英语说

We should keep the classroom clean and quiet

Keep the classroom clean and quiet.

就是alec123的

简洁准确

keep clean and silence in the classroom

The classroom should be kept clean and quiet.

我这句把“要”的意思也译进去了。
it is necessary to keep the classroom tidy and quiet

个人认为tidy比clean好，因为教室只要整洁就行了，不用”清洁”

We should keep our classroom clean and quiet.