单词 钠溶液 例句 DEFINITIVE EXAMPLES 权威例句〔kraft〕A tough, usually brown paper made from wood pulp treated with a solution of sodium sulfate, used chiefly for bags and wrapping paper.牛皮纸:一种由经过硫酸钠溶液处理过的木浆制成的硬纸,通常为棕色,主要...