When, therefore, his flight along a crooked stream is viewed endwise, it appears most strikingly wavered-a description on the air of every curve with lightning-like rapidity.

因，沿着一条弯曲溪流飞行时，从末端，它起来最引人注目地摇摆不定——对每条曲线都以闪电般速度在空中进行。