But recently the inland waterways, docks and fresh-water intakes of North America have been overrun by zebra and quagga mussels-species that originate from the area around the Black Sea.
但是，最近北美的内陆水道、码头和淡水入口蔓生了一种原存于黑海区域的斑马蛤贝和白斑马蛤贝。
3
Many power plants at coast area use seawater as condenser cooling water with the increasing demand of electric power and the shortage of fresh water.