有一天，我会羽根的女儿或儿子。
目的观察鸡羽根角蛋白管作为组织工程材料的毒性作用。
Objective to evaluate the toxicity of chicken calamus keratin (CCK) conduit as a tissue-engineered scaffold material.
小型鸟类一年进行一到两次换羽，在换羽期间，它们一次会替换掉9到10根左右的飞羽，而这个过程将持续几周时间。
Small birds molt once or twice a year, and they replace their 9 or 10 primary flight feathers a few at a time over the course of a few weeks.
拖着四根缎带般的硕长尾羽，羽片上还排列着羽支，体型只有鸽子大小的耀龙为我们提供了恐龙利用绚丽羽毛进行展示的最早证据。
Sporting a quartet of long, ribbonlike feathers with barbs arranged in vanes, pigeon-size Epidexipteryx may provide the earliest evidence of a dinosaur flaunting its feathers for display.
另一个是在丹麦发掘到的始新世（5500万年前）的一根羽骨。
The other was a feathered skull from the Eocene (55m years ago) that had been unearthed in Denmark.
拖着四根缎带般的硕长尾羽，羽片上还排列着羽支，体型只有鸽子大小的耀龙为我们提供了恐龙利用绚丽羽毛进行展示的最早证据。
Sporting a quartet of long, ribbonlike feathers with barbs arranged in vanes, pigeon -size Epidexipteryx may provide the earliest evidence of a dinosaur flaunting its feathers for display.
羽纤支从一根羽毛的羽小支上延伸或与羽小支交叉的…
One of the minute, hooked projections extending from and interlocking the barbules of a feather.
羽纤支从一根羽毛的羽小支上延伸或与羽小支交叉的…
One of the minute, hooked projections extending from and interlocking the barbules of a feather.
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