下面这两个句子是简单句还是复合句,为什么?
下面这两个句子是简单句还是复合句,为什么?
There will certainly be variations as to what is considered "proper" for a class based on the nature of the course.
It is very important for the education authorities to ensure that students are not overburdened with the school curriculum and are able to devote sufficient time for the overall personality development.