1. Migrating birds filled the pale sky. 迁徙的鸟布满了灰白的天空。
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。
