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介绍出现在邮票里的中国水利建设和设施以及其简介和故事。
This paper discusses the water projects in Chinese stamps and their stories.
youdao
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中国水利水电研究所的水资源部主管王浩说：“要改变学生们的观念很难。
It's hard to change students' mind.
youdao
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中国水利水电研究所的水资源部主管王浩说：“要改变学生们的观念很难。
It's hard to change students' mind.
youdao