帮助翻译一下? the soluble silicate salt comprises a sodium metasilicate (na.sub.2sio3) containing about 45-47% sio2 by weight. the soluble silicate salt comprises sodium silicates with a ratio of sio.sub.2:na.sub.2o of about 0.5-3.85. 对na.sub.2sio3 sio.sub.2 na.sub.2o 这三种表示不明白,还有 na.sub.2sio.sub.3是否就是na2sio3查看更多