he knows the ropes
他知道内情
以上为机器翻译结果，长、整句建议使用 人工翻译 。
He knows the ropes.
他知道其中的规矩。
youdao
Mr Brazauskas knows the ropes: from 1993 to 1998 he was the country's president, a mainly ceremonial job.
ECONOMIST: Charlemagne
"He's a big, strong, athletic guy who knows the ropes and knows what it takes to be successful in this league, " Tuck tweeted.
WSJ: Giants give WR Victor Cruz 1st-round tender
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