利用马立克氏病病、死鸡的皮肤（羽囊）打碎、制成MD琼扩抗原。

MD agar diffusion antigens were prepared by grinding the skins or feather follicles of dead or sick chickens due to Marek's disease.

youdao

美国洛杉矶县自然历史博物馆恐龙研究院负责人刘易斯·齐亚比说，这块皮肤上也没有长羽毛的恐龙所拥有的典型的羽囊。

And the skin also doesn't have the follicles that are typical of feathered dinosaurs, said Luis Chiappe, director of the dinosaur Institute at the Natural History Museum of Los Angeles County.

youdao