Therefore, your betta colour is determined by the colour pigments in their colour cells which are found within the layers of the skin.

因此，你的斗鱼的颜色由处于皮肤不同层次的色素细胞决定。

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If I looked within the skin, one of the lower layers of your skin, the connective tissue layer, you'd find many fibroblasts there and they're just waiting in a more rounded shape than this, just waiting to do their job.

如果观察皮肤,更深处的一层细胞,结缔组织层,就能看到许多成纤维细胞,它们平时形状接近圆形,时刻准备着去完成自己的任务

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The resin within the carbon layers is laced with lithium ions, so that each layer acts like an electrode, causing the positively charged lithium ions to collect in one layer when a voltage is applied, and a current to flow when the sandwich is placed in a circuit.

ECONOMIST: Carbon-composite batteries

The Gale Crater landing site at 4.59 degrees south, 137.44 degrees east, places the rover within driving distance of layers of the crater's interior mountain.

ENGADGET: NASA's Curiosity rover receives long-distance OTA update, 'brain transplant' on Mars

The coins, mainly bronze Nummi, were found in layers within the clay jar, with those at the top dating from between 333-335 AD, and the coins at the bottom at least 10 years older.

BBC: Shrewsbury hoard of Roman coins to go on display