它有一条又短又粗、长满了刚毛的尾巴。

It has a short stumpy tail covered with bristles.

《柯林斯英汉双解大词典》

鸟胚中的刚毛结构来自于被称为基板（placode）的微小皮肤细胞结构，基板顶端快速增殖的细胞环形成了刚毛的圆柱井结构。

In the bird embryo these bristles erupt from tiny patches of skin cells called placodes. A ring of fast-growing cells on the top of the placode builds a cylindrical wall that becomes a bristle.

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短毛型 被毛是直、短、紧且有光泽的，看不出任何刚毛的痕迹。

The smooth coat is straight, short, tight and glossy, with no trace of wiry hair.

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