(a) raise one's eyes 仰视
*She looked up (from her book) as I entered the room. 我进屋时, 她（放下书）抬眼看了看.
(b) (infml 口) (of business, sb's prospects, etc) become better; improve （指商业、某人的前景等）转好, 改善
*Inflation is coming down; unemployment is coming down; things are definitely looking up! 通货膨胀正在缓解, 失业情形正在改善, 形势确实已好转. look sb up (infml 口) visit or contact sb, esp after not having seen him for a long time 看望或接触某人（尤指久别後）
*Do look me up the next time you're in London. 你下次到伦敦, 务必来找我. look sth up search for (a word or fact) in a dictionary or reference book （在词典或参考书中）查阅（词或资料）
*If you want to know how a word is used, look the word up in the Advanced Learner's Dictionary. 要想了解某词的用法, 查《进修词典》.
* Look up the time of the next train in the timetable. 查一下火车时刻表中下一趟车的时间. look up to sb admire or respect sb 赞赏或尊敬某人
*She has always looked up to her father. 她一向崇敬父亲.