The perch is a freshwater fish.鲈鱼是淡水鱼。Coal is formed from the remains of freshwater plants.煤是由淡水植物遗骸形成的.There are bright prospects for freshwater fish farming.淡水养鱼大有可为....
There are bright prospects for freshwater fish farming.淡水养鱼大有可为.Both marine and freshwater fisheries are beset by a number of very serious human impacts.无论海洋渔业还是淡水渔业,都为人类造成的一系列严重影响所困扰.Limnology The scientific study of fr...
我洗不掉这焦痕.I could not wash away the mark of the scorch.焦痕: 部件表面的棕色印记或条纹.MARKS : Brown marks or streaks on the surface of the part.地面被烧得焦痕累累,光秃秃一片.The earth was scorched and bare....
炉箅子是高炉热风炉的重要部件之一.Furnace grate is a main part of hot blast stove.用于高炉 、 热风炉砌筑刚玉砖、莫来石砖 、 硅线石砖 、 低蠕变高铝砖.Used for corundum bricks, mullite bricks, silicate bricks masonry in blast furnaces, hot air stoves.热风炉是高炉系统中非常重要的设备之一...