While the battle raged the bullets flew thick as hail .

战斗激烈进行时，枪弹 密 如 雨点。

At the present the computer network develop rapidly all kinds of the course website as thick as hail especially English sites Self-study website etc ; but few for mathematics curriculum website construction .

在计算机网络高速发展的今天，各类课程网站 纷至沓来，尤其是英语网站、自学网站等；但却鲜有针对数学类学科的课程网站的建设。