令人吃惊的是，全美有10%的大学生选修天文学概况之类的课程，这使得天文学101成为最受欢迎的基础科学课程之一。
An astonishing 10% of all US college students take a survey astronomy course, which makes astro 101 one of the most popular introductory science courses.
简介了施工区地层，论述了钻井技术要点和成井工艺；说明了抽水试验及水质概况。
Brief introduction on strata in construction area and reviewed drilling technology and well completion technique, and meanwhile explained pumping test and water quality.
简介了施工区地层，论述了钻井技术要点和成井工艺；说明了抽水试验及水质概况。
Brief introduction on strata in construction area and reviewed drilling technology and well completion technique, and meanwhile explained pumping test and water quality.
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