freewheeling

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If you have any credit card debts from your freewheeling college years, begin paying those off in earnest.
如果你在随心所欲的大学生活里欠下信用卡债务，开始认真地还掉这些债务吧。
Of course you met people along the way, it was a freewheeling summer, lots of European kids-- it's normal for European kids to do that.
当然，你沿路会遇到不同的人，那真是一个随心所欲的夏天，所以有许多欧洲的孩子，在欧洲孩子这么做是很正常的。
By the same token, some freewheeling American doctors do not like KP’s rigid systems or fixed (albeit generous) salaries.
出于同样的原因，一些美国医生随心所欲，不像KP有一成不变的系统和固定的薪水。

The net is also being cast over markets in which freewheeling growth contributed to the crisis.
ECONOMIST: Financial reform in America
What Brown forsees is beyond the famous freewheeling Silicon Valley atmosphere of a Google or Yahoo.
FORBES: Workplace of Warcraft
For millions of secular Turks the army remains the sole guarantor of their freewheeling lifestyle.
ECONOMIST: The Turkish army

If you refer to someone's freewheeling lifestyle or attitudes, you mean that they behave in a casual, relaxed way without feeling restricted by rules or accepted ways of doing things.