基本解释炭化层英汉例句双语例句SEM observation revealed that puffy coking charred layers were formed by lots of closed bubbles in ABS specimen filled with IFR after burning.扫描电子显微镜观测发现，经IFR阻燃的ABS在燃烧时形成了由无数封闭孔洞构成的蓬松焦化炭层，表明IFR对ABS具有良好的膨胀阻燃效果。char layer更多例句词组短语短语coking charred layers 焦化炭层char layer更多词组