flow

平缓的河水流淌令人心旷神怡。

The gentle ___flow of the river was calming.

源源不断的信息流可能让人应接不暇。

The constant ___flow of information can be overwhelming.

在头脑风暴会议中，想法应该自由流动。

Ideas should ___flow freely during a brainstorming session.