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1·Migrating birds filled the pale sky.

迁徙的鸟布满了灰白的天空。《柯林斯英汉双解大词典》

2·North and South American species migrating across the Isthmus now came into competition with each other.

北美和南美的物种迁徙穿过地峡，现在开始互相竞争。

3·Most attempts to explain a hot Jupiter's existence envision it forming farther away, then migrating inward.

大多数试图解释热木星存在的设想是，它在更远的地方形成，然后向内迁移。

4·We will require wisdom and resoluteness to ensure that migrating species can continue their journeying a while longer.

我们需要智慧和决心，以确保迁徙的物种能够在更长时间里继续它们的旅程。

5·Today's farm laborers, while still predominantly born in Mexico, are more likely to be settled rather than migrating and more likely to be married than single.

今天的农场工人，虽然大部分仍旧是出生在墨西哥，但是更有可能是定居而不是移居，更有可能是已婚而非单身。

6·And with certain other migrating species, the challenge is complicated further—by vastly greater distances traversed, more jurisdictions, more borders, more dangers along the way.

对于某些其他的迁徙物种来说，挑战变得更加复杂——因为跨越的距离更大、管辖范围更广、边界更广、沿途的危险也更多。

7·Migrating animals maintain an intense attentiveness to the greater mission, which keeps them undistracted by temptations and undeterred by challenges that would turn other animals aside.

迁徙动物对于更宏大的使命保持着高度专注，这一使命让它们不会被诱惑分散注意力，也不会被挑战吓倒，这些挑战可能会让其他动物转变方向。

8·Recent evidence favors a rival to the long-standing theory that the Americas were colonized 11,000-12,000 years ago by people migrating south from Beringia along a midcontinental ice-free corridor.

最近的证据支持了一个与长期存在的理论对立的观点，该理论认为，在1.1万至1.2万年前，美洲是由从白令海峡沿中大陆无冰走廊向南迁移的人殖民的。

9·Mice that have been given morphine are very likely to develop blood poisoning because bacteria that normally reside in the intestine typically respond to morphine by migrating into the bloodstream.

摄入了吗啡的老鼠很可能会发生血液中毒，因为通常存在于肠道的细菌会通过迁移到血液中来对吗啡做出反应。

10·Readers are migrating away from print anyway.

无论如何，读者越来越少看纸质书了。