1. 发现(以前不知道的事实)
    If you discover something that you did not know about before, you become aware of it or learn of it.

    e.g. She discovered that they'd escaped...
           她发现他们已经逃跑了。
    e.g. I discovered I was pregnant...
           我发现自己怀孕了。

2. (偶然)发现;找到(一直在寻找的某人或某物)
    If a person or thing is discovered, someone finds them, either by accident or because they have been looking for them.

    e.g. A few days later his badly beaten body was discovered on a roadside outside the city.
           几天后，他的尸体在城外的路边被发现，身上有被严重殴打过的痕迹。

3. (第一个)发现
    When someone discovers a new place, substance, scientific fact, or scientific technique, they are the first person to find it or become aware of it.

    e.g. ...the first European to discover America...
           第一个发现美洲大陆的欧洲人
    e.g. In the 19th century, gold was discovered in California...
           19 世纪时，在加利福尼亚发现了金子。

4. 初次接触(某活动并乐在其中)
    If you say that someone has discovered a particular activity or subject, you mean that they have tried doing it or studying it for the first time and that they enjoyed it.

    e.g. I wish I'd discovered photography when I was younger...
           我要是早点接触到摄影技术就好了。
    e.g. Discover the delights and luxury of a private yacht.
           体验私人游艇的乐趣和奢华。

5. 发现，发掘(不为人所知的演员、音乐人等艺人)
    When an actor, musician, or other performer who is not well-known is discovered, someone recognizes that they have talent and helps them in their career.

    e.g. The Beatles were discovered in the early 1960's.
           甲壳虫乐队于20世纪60年代初为世人所知。