until the summer ends and they're forced to head south for the winter. 直到夏天结束 它们才会被迫南迁过冬

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  1. For the foxes, boom time has come to an end.
    对于狐狸来说 美好时光已经接近尾声
  2. But the mother has given her cubs the best possible start in life.
    但是母亲已经给了它们一个最好的开端
  3. The geese will continue grazing the tundra
    雪雁还将一直在苔原上吃草
  4. until the summer ends and they're forced to head south for the winter.
    直到夏天结束 它们才会被迫南迁过冬
  5. At these latitudes, the sun's rays are weak
    在这样的高纬度 阳光的强度非常微弱
  6. and grass can only grow here for a few months a year.
    这里的草儿只有几个月的生长期
  7. But further south, summers are longer and the grasslands flourish.
    但是在更远的南边 夏天的时间更长,草原更加茂盛

来自《行星地球 第一季 第七集 Planet Earth S01E07 伟大草原》第 132 行

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