known as被认为是，被称为
例句：Radio, television, newspapers and magazines are known as the mass media.
广播、电视、报纸和杂志被称为大众传媒。
2. Astronomer, Dr. Meghan Gray from Nottingham University explains the reason is all to do with complicated Science and Mathematics.
do with处理;对待
例句：What did you do with yourself during the summer holidays?
暑假你是怎样度过的?
3. "Our Year is made up of about 365 and a quarter days………"
make up组成, 构成
例句：The audience was made
