1. The measures and guidelines about the alteration of watercourse and the improvement countermeasure of " the secondary perched river " were discussed and some key technical issues were presented for further research work.
并提出了下游河道改造与“二级悬河”治理的具体措施和技术指标，以及需要研究的关键技术问题。
2. The perched stream is the river whose bed is apparently higher than the land side ground of the river wall and whose water level is higher than both side grounds all the year round.
悬河是指河床明显高于河流堤防背河侧地面的河，其水位常年高于两岸地面。
3. Perched between seven hills, Lisbon was built by seafarers where the Tagus River empties into the Atlantic Ocean and was once Europe's wealthiest capital and the center of world exploration.
位于七座山峰之间的里斯本，是由航海家们在塔霍河涌入大西洋的地方建立的，它一度曾是欧洲最富有的首都和世界探险之都。
4. The measures and guidelines about the alteration of watercourse and the improvement countermeasure of " the secondary perched river " were discussed and some key technical issues were presented for further research work.
并提出了下游河道改造与“二级悬河”治理的具体措施和技术指标，以及需要研究的关键技术问题。
1. It is about 50 kilometers away from the city of Jilin and perched at the lower reaches of the Songhua River.