1. He had been engaged in emissary activity before he was discovered.
   在被发现以前他一直从事间谍活动。
2. He’d been lining his pockets for years before it was discovered.
   他多年中饱私囊，终于东窗事发。
3. I was a serious computer nerd until I discovered girls and cars.
   在我注意到女孩子和汽车之前，我是个不折不扣的电脑痴。
4. We discovered him to be an imposter.
   我们发现他是个冒名顶替的骗子。
5. Fleming discovered penicillin by accident in 1928.
   弗莱明在1928年偶然发现了青霉素。
6. Fleming discovered penicillin early in the twentieth century.
   弗莱明在20世纪初首次发现了青霉素。
7. The antielectron, or positron, was discovered in 1932.
   反电子或正电子,是在1932年被发现。
8. We tried vainly to discover what had happened.
   我们设法想要弄清楚发生了什么事,但却徒劳。
9. Police discovered a cache of weapons in the room.
   警方在房间里发现了一批隐藏的武器。
10. They discover that the new teacher is a martinet.
    他们发现新来的老师非常严格。
11. I discovered the band back in the mid 70s.
    早在70年代中期我就慧眼看中了这个乐队。
12. Hummingbirds have discovered that nectar and pollen are very nutritious.
    蜂鸟发现花蜜和花粉是很有营养的。
13. Despite her penchant for chitchat, Yvonne was no birdbrain, Martin discovered.
    马丁发现，尽管伊冯非常喜欢瞎聊，可她并不是没头脑。
14. Identifying the virus gave scientists fresh hope of discovering a vaccine.
    鉴定病毒给予科学家发现疫苗的新希望。
15. He planned to steal the money, but his schemes were discovered.
    他打算去偷那笔钱, 但他的诡计被揭穿了。
16. I’ve only just discovered the splendors of the English countryside.
    我刚刚发现英国乡村的景色如此壮美。
17. The prospectors have discovered such minerals as calcite,quartz and asbestos here.
    探矿人员在这里发现了方解石、石英、石棉等矿藏。
18. It was necessary to discover the truth or otherwise of these statements.
    有必要查证这些说法是否真实。
19. The young madam was disconcerted to discover that she was being watched.
    "这位年青的太太发现有人在监视她,便惊惶失措。"
20. He was pleasantly surprised to discover that he was no longer afraid.
    让他惊喜的是他发现自己不再害怕了。

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