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A frigate soars.
軍艦鳥正在高飛。
Somewhere, beneath the surface below, there is the food it must have. But where?
水下某個地方一定有食物。可在哪里呢?
Those that fly above the ocean must be able to read the signs of fresh supplies, or perish.
飛越海洋的鳥類必須懂得尋找食物的蹤跡，不然就意味著死亡。
A hundred miles from the Mexican coast, and keen eyes have spotted movement.
距墨西哥海岸100英里，軍艦鳥銳利的眼睛正在搜尋。
Sailfish, three meters long, are closing in on prey.
3米長的旗魚正在接近獵物。
They will only use just enough energy to make their kill, never wasting a fin stroke.
它們只用恰到好處的力量來獵殺，從不貿(mào)然浪費力氣。
Nearly a hundred sailfish have surrounded a single school of baitfish.
近100條旗魚的包圍了這群餌魚。
It's very rare to see so many of these hunters in one place.
很少能見到上百條的旗魚在同一個地方出現(xiàn)。
To herd their prey, the predators raise their huge dorsal fins.
旗魚張開大大的背鰭來把獵物趕到一起。
A mistimed strike by one sailfish, could fatally damage another,
旗魚不恰當?shù)墓魰乐貍Φ酵椋?/div>
but each continually changes it's color, from blue, to striped, to black,
所以每條旗魚不斷變換顏色 從藍色到有斑紋到黑色，
that warns it's companions of it's intentions and also confuses the prey.
這可以警告同伴注意，同時也可以迷惑餌魚。
As the shoal is driven nearer the surface, it comes within the range of the seabirds.
當餌魚被趕上海面的時候，又進入了海鳥的攻擊范圍。
Out here, in the open ocean, there is nowhere for the baitfish to hide.
在這片空曠的海域中，這些小魚無處可藏。
