包含 rachis 的英语例句 | 欧路词典例句词典

英语例句库

In a pennaceous feather, the barbs grow helically around the tubular feather germ and fuse on one side to form the rachis.Simultaneously, new barb ridges form on the other side of the tube.

在正上，螺旋形绕著管状的芽生长，在管子的一在一起形成轴，同时在管子的另一形成新的脊。

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原声例句

大英百科全书

Today, the typical feather consists of a central shaft, called a rachis, with serial paired barbs forming a flat, curved surface, which is called a vane.

今天，典型的羽毛包含个中心轴（称为羽轴），还有连续对的羽支形弯曲的表面，这被称为叶片。

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PBS地

-动物趣闻

The central part of the feather became a hardened structure called a rachis, with lots of little barbs and barbules, creating the vanes of the feather.

羽毛的中央部分变种称为羽轴的硬化结构，上面有许多小倒钩和小枝，形羽毛的叶片。

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连线杂志

So where you see a typical flight feather that has a closed vein and an offset rachis to give it an aerodynamic airfoil shape, the ostrich is have done away with that completely.

所以如你所见这是个典型的飞行羽毛，有个封闭的静脉和个偏移的羽轴给它个符合空气动力学的翼型形状，鸵鸟已经完全失去这种羽毛。

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