They are able to align themselves in the current like windsocks at an aerodrome, so that they find the best position for power generation.
它们就像飞机场的风向袋，能在水流中保持方向，这样可以找到最好的发电位置。
2
They are able to align themselves in the current like windsocks at an aerodrome so that they find the best position for power generation.
它们就像飞机场的风向袋，能在水流中保持方向，这样可以找到最好的发电位置。
3
Famed astronomer Johannes Kepler noticed that comet tails always point away from the sun, implying that sunlight itself was pushing them around like cosmic windsocks.