Anas acuta

同根派生

A duck(Anas acuta) of the Northern Hemisphere, having gray, brown, and white plumage and a sharply pointed tail.
针尾松鸡北半球一种鸭（针尾鸭），有灰色、棕色和白色羽毛及尖尖的尾巴
Lesser Scaup Aythya affinis, Northern Pintail Anas acuta, and several sea ducks are showing troubling declines, but most geese are increasing dramatically and many ducks have held steady.
一些鸟类如针尾鸭和海鸭等的数量仍然在下降，但是大多数雁类的数量都有了明显增加，很多鸭子的数量也保持稳定。
It's very fortunate," Anas said.
这是非常幸运的事。”
ANA was detected in 73 of 92 patients((79.35%)).
92例PBC患者中有73例(79.;35%25)血清中存在抗核抗体(ANA);
Tests such as ANA and ANCA help.
测试抗核抗体和抗中性粒细胞抗体可帮助诊断。