But as you can see, astronomers have some pretty tried and tested methods for measuring distances in the Universe.

但是正如你所看的，天文学家已经有一些很好的尝试和测试宇宙长度的方法。

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You need trust because the technology has not been tried and tested.

你需要信任，因为技术还没有被尝试和测试。

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It supports large objects and stored procedures has been tried and tested.

它支持经过试验和测试的存储过程和大型对象。

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Mobile-phone users have also taken a shine to such games as Wireless Pets (about the trials of pet ownership), as well as such tried-and-tested time-killers as Hangman and Blackjack.

ECONOMIST: Hangman on your handset? It's becoming big business

The loss of the hi-tech equipment has focused attention on the data gathered by the tried-and-tested method of drilling through the ice by hand.

BBC: Arctic team gives up on ice radar

After a hugely-successful London run, the production is heading out Stateside in the spring, complete with its tried-and-tested formula of incorporating a mystery guest star every night.

BBC: Comedy prepares for Broadway debut