At the invitation of the united nations international strategy for disaster reduction un isdr , dr m c wong , assistant director of the hong kong observatory , gave a presentation at the " regional workshop on emergency information flow in disaster situations " held in bangkok from 13 to 14 june 2005 天文台助理台长黄明松博士应联合国国际减灾战略的邀请，于2005年6月13至14日在曼谷举行的灾害情况下的紧急资讯流程区域工作坊上发表演说。
At the invitation of the united nations international strategy for disaster reduction ( un isdr ) , dr m c wong , assistant director of the hong kong observatory , gave a presentation at the " regional workshop on emergency information flow in disaster situations " held in bangkok from 13 to 14 june 2005 天文台助理台长黄明松博士应联合国国际减灾战略的邀请，于2005年6月13至14日在曼谷举行的灾害情况下的紧急资讯流程区域工作坊上发表演说。
Voted " best convention exhibition centre " in the 1998 m c gold service awards ; voted " best convention centre " in the 1999 m c gold awards by meetings conventions asia pacific . hkcec website won a " standard of excellence webawards 1998 " at the prestigious us web marketing association webawards 获亚太会议( meetings & conventionsasia / pacific )杂志颁发一九九八年度业界服务金奖，赢得最佳会议/展览中心的殊荣；于一九九九年度业界金奖中荣获最佳会议中心。
4 the optimal water niche of m . h and m c are wetter than middle soil water content , belongs to mesophytes ; the optimal water niche of mosla scabra , on photosynthesis is more wetter than that of m . h and me , the optimal water niche between mesophytes and hygrophytes , and leaning to hygrophytes ; the photosynthetic water condition of m . d is arid environments , and its ecotype exits between mesophytes and xerophytes , and leaning to xerophytes . 5 m . h and m . s are locating between shade plants and sun plants , while m . c and m . d obviously belong to sun plants 4 、杭州石荠?与华荠?光合的最适水分条件是中等偏湿，其水分生态类型应属于中生植物；石荠?光合的最适水分条件比杭州石荠?与华荠?光合的最适水分条件要求更湿，其水分生态类型介于中生和湿生植物之间，更偏向湿生；小鱼仙草光合作用的水分生态条件是干旱条件，其水分生态类型介于中生与旱生植物之间，更偏向旱生。
This paper consists of three parts . in the first chapter , cogburn ' s theories on markov chains in random environments are outlined . in the second chapter , the states of the markov chain in the random environment are classfied and a example of m c e is given . in the third chapter , some properties of markov chain are studied by foguel " s analytical ideas 全文共分三章，第一章就随机环境中的markov链，概述了cogburn的有关理论；第二章对一类随机环境下的markov链进行状态分类，并给出了m真包含于e的一个实例；第三章运用foguel的分析观点得到markov链的一些一般理论。
