英语高手来帮忙解释这两个英文句子~

Susan is as old as May.

Brain is more careful than any other boy in our class.

Susan is as old as May.
No one else in your class can be more carefully than brain.

Susan and May are of the same age.
No one is more careful than Brain in our class.

Susan is as old as May.
No one is more careful than Brain in our class.

苏珊是相同的年龄，为5月

大脑是最认真的孩子在我们的课堂。

Susan is of the same age as May.
No one can be more careful than Brain in our class.