carbon coating短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 涂碳层 The content of the samples used in this study are: 50 wt% of Si powder, 30 wt% of natural graphite and20 wt% of coated carbon including carbon coating on both Si powder and graphite. 研究的样品里包括：50%的硅粉，30%的天然石墨和20%的涂炭包括在硅粉和石墨上的涂炭。 emuch.net