In the centrifuge, three distinct layers emerge.

在离心机中，出现了三个不同的层。

I'll save you the trouble and tell you that its wall is made up of three distinct layers — the fibrous, vascular, and inner layers.

我会帮你省去这个麻烦，告诉你它的壁由三个不同的层组成——纤维、血管和内层。

Another vocal development during puberty occurs when the homogenous tissue covering the folds specializes into three distinct functional layers: a central muscle, a layer of stiff collagen wrapped in stretchy elastin fibers, and an outer layer of mucus membrane.

青春期的另一种声音发育发生在覆盖褶皱的同质组织专门分为三个不同的功能层时：中央肌肉、一层包裹在弹性弹性蛋白纤维中的硬胶原蛋白层和外层粘液膜。