一股气流

一只大雁的翅膀扇动空气，在身后留下一股气流。

A goose ' s wings churn the air and leave an air current behind

当一股气流自由膨胀时，运动着的气流构成一个假想的圆锥体，其轴线与气流的轴线相重合。

When an air jet is allowed to expand freely, the moving air is contained within an imaginary cone whose axis is coincident with that of the air jet.

一只大雁的翅膀扇动空气,在身后留下一股气流.

A goose ' s wings churn the air and leave an air current behind.

（舌尖触碰上齿，有一股气流从里面涌出来），难道是武林高手的气运丹田吗？

The tip of the tongue touches the upper teech and that is an air flow coming out .