are deflected upwards and can help the birds gain height. 有利于游隼飞得更高

68. New York City has the highest density
    纽约市的游隼密度
69. of nesting peregrines anywhere on the planet.
    居世界之最
70. Winds striking the sides of the skyscrapers
    风被摩天大楼阻挡后会向上偏转
71. are deflected upwards and can help the birds gain height.
    有利于游隼飞得更高
72. And the great areas of concrete roasting in the sun create thermals,
    烈日下大面积的混凝土散发的热量形成上升热气流
73. so that, with very little effort, the birds can soar over the city.
    游隼不费吹灰之力便可以在城市上空翱翔
74. And so many peregrines can live here,
    不计其数的游隼定居于此

来自《行星地球 第二季 第六集 Planet Earth S02E06 城市》第 71 行