If you peel birch bark in the winter, we call it "the winter bark", another layer, a tougher inner layer of the tree adheres to the bark, producing a stronger material.

如果你在冬天剥桦树皮，我们称它为“冬树皮”，另外一层更加坚硬的紧贴树皮的树层就可以生产出更强更硬的材料。

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The inner layer depicts a pattern similar to a distorted view of clouds moving through the sky.

里层模仿类似于穿过天空的云层扭曲景象。

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The mother bee neatly folds in the inner layer of petals, smears a paper-thin mud layer and then folds the outer petals.

母蜂先把最里面那层花瓣整齐地弯曲折叠起来，抹一层纸张厚的泥巴，再然后把外边那层花瓣也叠起来。

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The inner layer of gramicidin (the one next to the glycol) consists of channels that have been chemically tethered to the gold.

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In Kent's aorta model most of the tears are transverse, or across the artery, in a section called the isthmus, and they start on the intima, or the inner layer of the aorta.

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Red giants are created when a star exhausts its supply of hydrogen at its core, with the result that the inner layer contracts and the outer layers expand, forming a redder and much larger star.

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