Other birds flying in the upwash experience reduced drag, and spend less energy propelling themselves.

其他经历上洗流的飞鸟会受到变弱的阻力，样在推动自身向前飞行的过程中够消耗较。

The air flowing over a bird's wings curls upwards behind the wingtips, a phenomenon known as upwash.

鸟翼上方的气流在翼尖后方向上盘旋，种现象被称作气流上洗。