people who know the ropes

例句：

1. 1. I know you're going to the party tonight.
   我知道你今晚要去参加聚会。
2. 2. She knows how to fix cars.
   她知道如何修车。
3. 3. We need to know more about the history of the city.
   我们需要更多地了解这座城市的历史。