For example, in Roman times, engineers discovered that if the upstream supports of a bridge were shaped to offer little resistance to the current of a stream or river, they would last longer.
2
那位工程师建议在河流的上游修建一座水坝。
The engineer proposed to build a dam on the upper reach of the river.
3
紫坪铺水利枢纽工程位于四川省西部的岷江上游，映秀至都江堰市沙金坝河段上。
Zipingpu Multi-purpose Dam Construction Project is located at Yingxiu-Dujiangyan reach, upstream of Minjiang river, west Sichuan.
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