他销售汽车有三十年了，已经成了和顾客讲价成交的专家。这里know the ropes意思还是熟知内情、掌握秘诀。
He's been selling cars for thirty years and he's become an expert at closing deals with customers.
他销售汽车有三十年了，已经成了和顾客讲价成交的专家。这里know the ropes意思还是熟知内情、掌握秘诀。
He's been selling cars for thirty years and he's become an expert at closing deals with customers.
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