英语 句中的flow怎么理解Whenever we are involved in a creative activit

英语 句中的flow怎么理解
Whenever we are involved in a creative activity that is self-rewarding,a feeling called "flow" overcome us.When we are flowing,we lose all sense of time and awareness of what is happening around us;instead ,we feel that everthing is going just right.
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请问文中flow怎么翻译！谢谢回答！