Human behaviour, however, is having a detrimental impact on animal migration.(然而，人類行為正在對動物遷徙產(chǎn)生不利的影響。)

Without more research, we can't predict if Assisted Migration will work for any given species.(沒有更多的研究，我們無法預(yù)測輔助遷移是否適用于某一特定的物種。)

Migration is a complex issue, and biologists define it differently, depending in part on what sorts of animals they study.(遷徙是一個復(fù)雜的問題，生物學(xué)家對此有不同的定義，定義的方法部分取決于他們研究的動物種類。)

Surprisingly, Bailyn suggests that those who recruited indentured servants were the driving forces of transatlantic migration.(令人驚訝的是，貝林認(rèn)為那些雇傭契約仆役的人是跨大西洋移民的驅(qū)動力。)

They have led some birds to give up on migration.(它們導(dǎo)致一些鳥類放棄遷徙。)

Seasonal migration is another form of escape, especially for large mammals or birds.(季節(jié)性遷徙是另一種逃避方式，特別是對大型哺乳動物或鳥類來說尤為如此。)

Migration is usually defined as "permanent or semipermanent change of residence".(移民通常被定義為“永久或半永久的居住變化”。)

Considerations of this sort lead to the development of migration flow.(這類考慮導(dǎo)致了移民流動的發(fā)展。)

From this evidence it was deduced that there had been three major waves of migration across the Bering Strait.(從這個證據(jù)可以推斷，橫跨白令海峽的大型移民潮曾經(jīng)有過三次。)

However, when the lemmings' food supply becomes too low to support the population, a singular migration commences.(然而，當(dāng)旅鼠的食物供應(yīng)變得太少而無法維持種群時，一次特別的遷徙就開始了。)