closing n. 1.封闭,停闭;封闭口;【植物;植物学】郁闭。 2.终结,结尾;完工。 3.(交易等的)谈妥;结账;地产成交会。 adj. 结尾的,末了的;闭会的。 a closing account 决算。 a closing address 闭会词。 a closing hour 停止营业的时间;临终时刻。 the closing date 决算日。 the closing day 截止日期。 the closing time 截止时间;停止时间。
In chapter 1 , the principle and engineering measures of bringing under control are analyzed at first , the problem of water environment arisen in harnessing closed levees are discussed , too . then present conditions of simulation research on solute movement in groundwater are summarized . in addition , the importance and contents of simulation research on solute movement in groundwater are set forth 论文第一章绪论部分首先分析了圩区治理的原则与工程措施,其次讨论了圩区治理中出现的水环境问题,后在此基础上对国内外地下水溶质运移模拟研究现状进行了概括,并阐述了地下水溶质运移模拟研究的重要意义与内容,最后论述了本研究课题的提出。