so he can't stay in these chilly waters for long. 因此它不能在冷水里待太久
..so they won't attract the attention of predators. 因此不会吸引捕食者的注意
Not so long ago, these whales faced a graver threat. 不久之前 这些鲸鱼面临着更严重的威胁
so they use their barbels to sense the movements of their victims. 它们依靠触须来探测猎物的动静
So, they wait for others to arrive. 所以它们等候大部队一同抵达
But the first to do so are at the highest risk 但第一个回来的最有可能
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
And so many peregrines can live here, 不计其数的游隼定居于此