Area 51 staff had to regularly interrupt such tests and hurry prototypes into "hoot-and-scoot sheds", lest they are detected by Soviet spy satellites.

51区的工作人员不得不经常中断这种测试，匆忙地将这些样机送到“紧急藏身处”，以免它们被苏联间谍卫星发现。

youdao

He was released in a U.S.-Soviet spy swap after serving 21 months.

VOA: standard.2010.05.07

The Express is angry at the decision not to prosecute the 87-year-old former Soviet spy, Melita Norwood, and four others.

BBC: Mail spies Bond knighthood

To general astonishment, this revealed that an 87-year-old great-grandmother from London's southern suburbs, Melita Norwood, had been a Soviet spy for nearly 40 years.

BBC: Spying scandal spreads

If there was a cloud in his life it may be that his brother John turned out to have been a Soviet spy.

ECONOMIST: Sir Alec Cairncross