大多数的鸟类不得不飞行很长的距离进行迁徙。
早期的研究发现，它们流过很长的距离后汇入海洋，会损害沿途的生态系统。
Earlier research has found that they flow over long distances and into our oceans, hurting ecosystems along the way.
如果工作要求雇员通勤很长的距离或者搬到另一个州，那么雇主则会发现他们应该提供更丰厚的待遇。
If jobs require people to commute a great distance or to move themselves to another state, employers may find they need to sweeten their offers.
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