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1.the middle of the chief navigable channel of a waterway that forms the boundary line between states.
形成国家之间的边境线的水路上的主要航行路线的中间部分。收藏指正
2.In case a non-navigable stream or man-made waterway becomes navigable after a dam or sluice gate structure is built, the construction unit shall simultaneously build ship passage facilities or reserve sites for such facilities, and the expenses needed thereby incurred shall be borne by the communication departments concerned, unless there are other State-provisions applicable.
　　在不通航的河流或者人工水道上修建闸坝后可以通航的，闸坝建设单位应当同时修建过船设施或者预留过船设施位置，所需费用除国家另有规定外，由交通部门负担。收藏指正
3.A river of southern England flowing about338 km(210 mi) eastward to a wide estuary on the North Sea. Navigable for large ships as far as London, it is the principal commercial waterway of the country. In its upper course above Oxford it is often called Isis.
西蒙斯河流程约338公里（210英里）的南英格兰河，向东流向北海宽湖三角湾。巨轮航运远至伦敦，它是该国主要商业水路。牛津以上上游部分通称为伊塞斯收藏指正
4.Based on the analysis of basic characteristics of Jinghong Reach in the Lancang River, variations of the navigable conditions caused by the regulation project in Jinghong Reach are investigated by 2-D mathematical model. The results show that the navigable conditions in the reach after implementation of the regulation project can basically meet the standards for class-V waterway.
在分析景洪水道基本特征的基础上,结合定床模型试验提出的Ⅴ级航道整治方案,采用平面二维水流数学模型进行了水面线和流场分析计算,研究了景洪水道Ⅴ级航道整治后通航条件的变化,结果表明在整治工程实施后该河段通航条件能基本满足Ⅴ级航道标准。收藏指正
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