and when it happens they must make the most of it. 一旦发生 它们必须尽可能地利用它

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happens most make must it they of when the and
  1. The periods of boom in Death Valley are short.
    死亡谷中的花期很短
  2. but they're just frequent enough to keep life ticking over.
    但它们发生的次数 足以保证生命长盛不衰
  3. A sudden flush of vegetation is what every desert dweller waits for,
    植物的突然兴盛是 所有沙漠动物都盼望的事
  4. and when it happens they must make the most of it.
    一旦发生 它们必须尽可能地利用它
  5. There is no other species on the planet that responds as quickly and as dramatically to the good times as the desert locust.
    好日子到来时 地球上没有其它物种 能像沙漠蝗那样迅速而又戏剧性地作出反应
  6. Eggs that have remained in the ground for 20 years begin to hatch.
    在地下埋藏了20年的虫卵开始孵化
  7. The young locusts are known as hoppers,
    沙漠蝗的若虫是跳跃能手

来自《行星地球 第一季 第五集 Planet Earth S01E05 沙漠》第 301 行

Walden21
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