tried but couldn
试过了，但做不到
以上为机器翻译结果，长、整句建议使用 人工翻译 。
"We knew the history of failure, that several legitimate labs had tried but couldn't make it work, " he says.
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"They tried to move out but couldn't find work, so they're back, " says Ms. Marr.
WSJ: A City Slips as Downgrade Hits Home
It tried importing from Mexico but couldn't make this pay.
ECONOMIST: Germany��s biggest carmaker is leaving rivals in the dust
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