Ject对"keratin" 的正确翻译：n. [化]角质素。发音：['kerətin]。例句参考：A human hair consists mainly of a protein called Keratin. It also contains some moisture and the trace metals and minerals found in the rest of the body. - 人类的头发主要由一种叫角朊的蛋白质组成，并含有水分及在身体其他部分也可找到的微量金属和矿物质。；