1. act on/upon sth (=to do something because of another person's advice or order, or because you have received information or had an idea)v.根據(建議、命令、信息等)行
2. be out of action (=If a machine or vehicle is out of action, it is not working or cannot be used)a.(機器、交通工具等)壞了，失靈了，無(wú)法工作了
3. add up to sth (=AMOUNT：to become a particular amount)v.合計達，總共是
4. add up to sth (=to have a particular result or effect)v.造成…后果，產(chǎn)生…結果，起作用
5. in addition sth (=used to add another piece of information to what you have just said)ad.另外，從另一方面來(lái)講
