You can ask for a chemical analysis of your tap water.
你可以要求给你的自来水做化学分析。
Chemical analysis of water yields hydrogen and oxygen.
水经过化学分解产生氢和氧。
The results of common chemical analysis indicated that the NO3-N movement was coresponded with the water condition.
结果表明，NO3—N的移动同降雨、灌水以及整个土壤系统中的水分状况密切相关。
应用推荐