Apart from the hair, he looked extraordinarily unchanged.令人惊奇的是,除了头发,他看起来一点儿都没变。For many years prices have remained virtually unchanged.价格多年来几乎没变。The bank left its lending rates unchanged.该银行的贷款利率保持不变。...
目的探讨我国二甲基甲酰胺 ( DMF ) 的生物接触限值 ( BEI ).Objective To explore the biological exposure indices ( BEI ) of dimethylformamide ( DMF ) in China.研究表明,该反应器可有效降解苯甲酰胺.The results show that the new type reactor could degrade benzamid...