When spring comes, they take wing for the Arctic.

春天来临时，它们就振翅飞向北极。

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Among the early exponents was Duane Beeson, seen here on the wing of his only P-51B, 43-6819, nicknamed BEE, in the spring of 1944.

杜安•比森是第4大队早期的王牌飞行员之一，在这张摄于1944年春的照片中，他站在自己驾驶过的唯一一架P-51B型机“蜜蜂”（P-51B 43-6819）的机翼上。

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SIXTEEN million migratory birds fly to Britain every year from sub-Saharan Africa in a flurry of wing beats that herald the spring.

每年有50多种、1600万候鸟从非洲萨哈拉南部启程，挥动着翅膀、势如疾风来到英国，预示着春天到了。

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Work on the new wing is expected to start in the spring and be finished during the second half of 2014.

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Other upgrades include a new spring-loaded, adaptive rear wing and the Triplex rear suspension, comprising a bidirectional hydraulic strut mounted horizontally between the pushrod rockers.

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