B
生物医药大词典
by MedSci
菜单
词典
分类
百科
诗词
背单词
英文名
DeepEvidence ↗
确认登录状态…
例句 /
A cellulose nitrate used as a component of smokeless powder.
A cellulose nitrate used as a component of smokeless powder.
火纤维素硝酸纤维素,用于无烟的炸药的组成物质