The two halves of the main branch have grown apart.

主枝的左右两边各向不同的方向生长。

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.

而不论是何种羽毛，羽枝主枝延伸出来的羽小枝，都羽枝脊表面叫做「羽小枝板」的单层细胞长出来。

The two halves of the main branch have grown apart.

主枝左右两边各向不同方向生长。

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.

而不论是何种毛，枝主枝延伸出来枝，都枝叫做「枝板」单层细胞长出来。

The two halves of the main branch have grown apart.

主枝的左右两边同的方生长。

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，羽枝主枝延伸出来的羽小枝，都羽枝脊表面叫做「羽小枝板」的单层细胞长出来。

The two halves of the main branch have grown apart.

主枝的左右两边各向同的方向生。

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.

论是何种羽毛，羽枝主枝延伸出来的羽小枝，都羽枝脊表面叫做「羽小枝板」的单层细胞出来。

The two halves of the main branch have grown apart.

主枝的左右两边各向不同的方向生长。

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.

而不论是何种羽毛，羽枝主枝延伸出来的羽小枝，都羽枝脊表面叫做「羽小枝板」的单层细胞长出来。

The two halves of the main branch have grown apart.

主枝的左右两边各向不同的方向生长。

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.

而不论是何种羽毛，羽枝主枝延伸出来的羽小枝，都羽枝脊表面叫做「羽小枝板」的单层细胞长出来。

The two halves of the main branch have grown apart.

主枝的左右两边各向不同的方向生。

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.

而不论是何，枝主枝延伸出来的小枝，都枝脊表面叫做「小枝板」的单层出来。

The two halves of the main branch have grown apart.

主枝左右两边各向不向生长。

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.

而不论是何种羽毛，羽枝主枝延伸出来羽小枝，都羽枝脊表面叫做「羽小枝板」单层细胞长出来。

The two halves of the main branch have grown apart.

左右两边各向不同方向生长。

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.

而不论是何种毛，延伸出来小，都脊表面叫做「小」层细胞长出来。