book 1 unit 1 friendship 1. add vt./vi add up sth. =add sth. up 把…加起来add to sth. 增添、加某事物 add…to… 把…加到…里 add up to=amount to 共计，总计 ① if you ____ 5_____3 you will get 8. ② this bad weather ________ our difficulties. ③ his whole school education _______________ no more than one year. 2. point n./v. there is no point （in） doing sth. 做…没用，无意义
