Hydroelectric energy is made by flowing water. Most hydroelectric power plants are located on dams, which block the river and create an artificial lake. A controlled amount of water is forced through tunnels in the dam to produce electricity.
Hydroelectric energy has some advantages. First, it is fairly inexpensive to produce. Dams don’t need to be complex, and the resources to build them are not difficult to obtain. Second, its source is available to many people as rivers flow all over the world. Third, it’s fairly reliable for the flow doesn’t depend on the weather but the control by engineers.
Seafood is respected all over the world as an important source of protein and healthy fats. In order to continue relying on the ocean as an important food source, we need to employ sustainable fishing practices. Some of these sustainable fishing practices are still used today. For example, people in Hawaii practice spear fishing. Modern spear fishing is practiced all over the world. Another way to prevent overfishing is to simply refrain from eating fishing and other seafood. According to marine scientists, people need to take a break from eating seafood until we learn better how to maintain healthy fish and wildlife populations.
overfishing 过度捕捞 seafood 海鲜 wildlife 野生动物
take a break from 从。。。中暂停
注意一词多义 听力考试中出现过相同的意思：coffee break