His tail has long age been lost, leaving only the smallest stub, which he would constantly jerk and twitch.

他的尾巴大部分也都不见了，只剩下一个短小的咎，却像是始终在不停地摇呀，摇呀。

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Young quetzals can fly at about three weeks of age, but males do not begin to grow their long tail plumes for three years.

还长成的凤尾绿咬鹃在三周大时就可以飞了，不过，雄鸟在出生后的三年之内不会长出长长的尾羽。

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The main results showed as follows: Trial one: 30-day age, 15 birds male small-fat-tail sheep according to body equal completely randomized design, were divided into 3 groups each with 5.

详细结果如下：试验一：采用随机分组对照试验设计，选用体重基本一致的30日龄小尾寒羊公羊15只，随机分成3个处理，每个处理5只。

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Although the article did not cite any sources, and despite the rumor's age, investors still decided to chase the story's tail.

FORBES: Magazine Article

As the country gets richer and its working-age population starts to shrink, that growth rate is likely to tail off to perhaps 8% soon.

ECONOMIST: Becoming number one | The

The creature's discovery has astounded scientists because their age puts them within two recognized groups of pterodactyls -- primitive long-tailed forms and advanced short-tail forms -- and they display characteristics of both.

CNN: Pterodactyl fossil fills gaps in evolutionary tale