The International Commission on Large Dams is a non-governmental International Organization which provides a forum for the exchange of knowledge and experience in dam engineering.
The Organization leads the profession in ensuring that dams are built safely, efficiently, economically, and without detrimental effects on the environment. Its original aim was to encourage advances in the planning, design, construction, operation, and maintenance of large dams and their associated civil works, by collecting and disseminating relevant information and by studying related technical questions.
Since the late sixties, focus was put on subjects of current concern such as dam safety, monitoring of performance, reanalysis of older dams and spillways, effects of ageing and environmental impact. More recently, new subjects include cost studies at the planning and construction stages, harnessing international rivers, information for the public at large, and financing.
虚拟条件句的倒装
With的复合结构作独立主格
原因状语从句
倒装句之全部倒装
一般过去时的用法
wish的用法
need/want/require/worth
一般现在时表将来
不用被动语态的情况
一般现在时代替将来时
一般现在时的用法
用于现在完成时的句型
分词的时态
分词的语态
指代意义决定谓语的单复数
反意疑问句
since的四种用法
主动形式表示被动意义
感叹句结构
比较since和for
be afraid doing/to do
一般将来时
分词作插入语
so, neither, nor作部分倒装
用一般过去时代替完成时
特殊的虚拟语气词:should
as, though 引导的倒装句
被动形式表示主动意义
延续动词与瞬间动词
非真实条件句
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