用大坝阻断河流使得鱼类无法逆流而上去产卵，同时淤泥无法顺流而下去肥沃土地。
Blocking a river with a dam also blocks the movement of fish upstream to spawn and the movement of silt downstream to fertilise fields.
每年鲑鱼卵都会在哥伦比亚河中孵化，小鲑鱼顺流而下进入太平洋，等到成熟后又会逆流而上抚育下一代。
Salmon hatch in its waters, migrate downstream to the Pacific Ocean, and return against the current to breed.
利用顺流及逆流网络方程提出一种确定电源与负荷功率分配关系的功率分解解析方法。
This paper proposes an efficient analytical method for power allocation, which makes sure of the power transferred between generators and loads using downstream and upstream network equations.
夏天到了，人和狗背上行李，乘木筏渡过群山间蓝蓝的湖泊，又坐著在森林里锯下的木头做成的小船沿著一些不知名的河流顺流而下或逆流而上。
Summer arrived, and dogs and men, packs on their backs, rafted across blue mountain lakes, and descended or ascended unknown rivers in slender boats whipsawed from the standing forest.
顺流槽(CTS)和逆流槽(CTN)，分别适用于不同选别颗粒度及不同选别工艺的要求。
Downstream slot (CTS) and counter-current slot (CTN) respectively, suitable for different sorting granularity and different sorting process requirements.
结果表明：逆流操作的净化效率高于顺流，气(液)体流量对出、进口气(液)体温差有较大影响。
The result shows that the purification efficiency is higher under counter current operation than that under co-current operation.
从1985年至今，顺流式、逆流式、横流式以及混流式谷物干燥机的研究已经取得了成功。
Since 1985, research on simulation and modeling of concurrent flow, counter flow, cross flow, mixed flow grain dryers had been accomplished.
根据用户需要，可提供顺流、半逆流、逆流型等多种不同表强的磁选。
According to user needs Can provide downstream, semi-reflux, reflux-type and so many different form strong magnetic separation.
研究固定床工艺和搅拌槽工艺对吸附剂吸附效率和工作吸附容量的影响，比较了逆流解吸和顺流解吸对回收率的影响。
The effects of technology of fixed bed and stirred cell on adsorption efficiency and working adsorption capacity of adsorbents were studied.
在相同工况下，逆流时对数平均温差最大，顺流时最小，混合流型介于二者之问。
Under the same conditions, when the logarithmic mean temperature difference between upstream maximum downstream, the smallest of the mixed flow pattern between the two asked.
磁选主机根据磁选原料的干湿程度，分为顺流、逆流干湿两种。
Magnetic separation of magnetic materials according to host drought-wet degree, divided into downstream, counter-current dry wet two kinds.
反应容器的形状能够让金属无论是在逆流回到熔炉时还是顺流到熔铸系统的时候，都随着LARS的掀动而流动。
The configuration of the reaction vessel permits flow of metal during LARS tilting either upstream and back into the furnace or downstream to the casting system.
加热装置的设置方式对加热效果有重要影响，在同等条件下，逆流加热装置的对流传热量是顺流加热装置的1.62倍。
The effect of the arrangement of heating devices on the heating is obvious. At the same conditions, the convection heat transfer of reverse flow heating device is 1.62 times of that of normal …
加热装置的设置方式对加热效果有重要影响，在同等条件下，逆流加热装置的对流传热量是顺流加热装置的1.62倍。
The effect of the arrangement of heating devices on the heating is obvious. At the same conditions, the convection heat transfer of reverse flow heating device is 1.62 times of that of normal …
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