Many ways and tools have been tried to discover this wide and exciting field.

人们尝试了许多方法和工具来探索这个广泛而令人兴奋的领域。

youdao

All possible means and ways have been tried.

方法都用绝了。

《新英汉大辞典》

Both plans have been tried, but without success.

两个办法都试了试，但没有成功。

《新英汉大辞典》

He says international politics explain why so few have been tried for rights abuses.

VOA: standard.2009.09.07

Socrates understands that those who want to reform others must reform themselves, but many who've tried to imitate him have been less careful.

苏格拉底了解到,那些想改革他人者,必需先自我改革，但许多尝试,模仿他的人并没有仔细分辨这一点。

耶鲁公开课 - 政治哲学导论课程节选

And should that baby be born preterm, we should care for that baby by providing a package of interventions that have been shown to be tried and true and very effective."

VOA: special.2009.10.26

These are the comments of ministers who believe all other options have been tried.

BBC: Will the euro survive?

They have been tried and tested in other advanced democracies - and have worked.

BBC: NEWS | UK | Politics | Text of Michael Howard's speech

Twice as many new Vioxx cases are scheduled as have been tried so far.

FORBES: Magazine Article