中文摘要：

报告了大质量恒星形成区的星际分子脉泽巡天观测结果。所观测到的H2O与OH分子脉泽可分为三类，它们的数量近似相等，寿命亦近似相等～10^5年，但HⅡ区普遍短缺。提出了一种新的辐射机制模型，它克服了旧辐射模型的缺点，可以解释星际H2O与OH脉泽的成因，以及作者的观测统计结果。

英文摘要：

A statistics of sky survey for interstellar H2O and OH masers is presented. These masers can be classified into 3 categories. The total number of sources in each category is of the same order of magnitude, and they can maintain -10^5 years. But there are fewer than half masers with detectable HⅡ regions. An improved radiative pumping mechanism is proposed, and it overcame the known drawback of former radiative models. The observationally statistical results can be interpreted by both the new mechanism and the evolutional model with gravitational force of star responsible for the HⅡ region.