双语例句原声例句
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他们使用新型枪支，鸟类在飞行中很容易被击落，而且数量很大，以至于商业捕猎鸭鹅成了一种行业。
They use new types of guns, and birds could easily be shot down in flight, and in such great numbers that commercial hunting of ducks and geese became an industry.
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它大到足以保卫其自身，而且数量就是安全。
It's big enough to defend itself; there is safety in Numbers.
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目前，亚马逊提供的电子书约有一百万本，而且数量还在不断增加。
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It's harder to find, they're more limited numbers, and in general, more difficult until eventually down this pathway you have fully differentiated cells, cells that are fully mature and performing the function of the mature organ.
不过找起来更困难,因为它们数量稀少而且通常很难定位,在分化的终末阶段,你可以看到完全分化的细胞,这些细胞完全成熟,在成熟的器官中发挥功能
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