main chance的意思

汉语翻译

例句：

1. Bob visits his rich uncle every week; he's always had an eye on the main chance.鲍勃每周都去拜访他有钱的叔叔，他总是图谋私利的。
2. Being ambitious, he always had an eye to the main chance.他野心勃勃，时刻盯着发财的机会。