Swallows fly to the south before winter, and fly back in spring.
燕子冬天之前飞到南方,春天又飞回。
In winter, many birds fly to the south, because they need to find a warm place to live, but they will fly back in spring.
冬天,很多鸟儿会往南飞,他们需要给自己找个温暖的地方生存,但是到了春天,它们又会飞回来。
Arctic terns, being true long-distance migrants, they nest in coastal wetlands of northern Europe but fly south for thousands of miles to spend the European winters in Antarctica.
北极燕鸥是真正的长途迁徙者,它们在北欧沿海湿地筑巢,但会向南飞行数千英里,在南极洲度过欧洲的冬季。
But,during the past three years, some have failed to fly south.
VOA: special.2010.03.02
Afriqiyah said its crewmembers were Libyan. Officials in South Africa reported most aboard the flight had planned to make a connection in Tripoli and fly on to various destinations in Europe.
VOA: standard.2010.05.12
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