In both types of feather, the barbules that extend from the barb ramus grow from a single layer of cells, called the barbule plate, on the periphery of the barb ridge.
而论是何种羽毛,从羽枝主枝延出来的羽小枝,都从羽枝脊表「羽小枝板」的单层细胞长出来。
声明:以上例句、词性分类均由互联网资源自动生成,部分未经过人工审核,其表达内容亦不代表本软件的观点;若发现问题,欢迎向我们指正。