应不应该在海里建artificial reef 1. 人工珊瑚礁给鱼类更多聚集和繁殖的空间，鱼类数量可以得到增加。 2. 人工珊瑚礁可以改进小渔民的竞争力。 3. 人工珊瑚礁可以用于回收无用的materials。 听力：1, 鱼的overall population不一定就grow larger了。只是因为reef吸引鱼，所以鱼都跑reef那去了。总体的population都跑那去了。decrease了。 2. 不应该让私人搞小reef。不然有safety problem：其他渔夫不知道的，下网了以后就会死菜。在shallow waters，小船还会整个崩掉cracks。 3. 会cause environmental problems。被风吹了会散开，然后把很多marine plants和animal搞死了。
The lecture opposes the view mentioned in the reading with strong supporting evidences presented, aiming to further illustrate that it is not a wise idea to build up artificial reef in the sea. Firstly, from the perspective of habitat, the professor states his doubt, because according to the lecture, although the fish will be attracted by the coral reef and congregate around the habitat, competition for habitat and food sources will be fiercer than before. And this is harmful for the population growth. Moreover, judging from the potential economic value, the professor holds a different view, as the lecture further illustrates that there will be problems concerning safety. For example, the reef will make the sea even shallower, and if unfortunately some ship crosses over this area, the ship will crack. Last but not least, on the point of natural resource, the professor never fails to express his concern, because in terms of the listening, there might be some environmental problems. When the dead reef is blew over the sea, it will bring danger to many marine plants as well as animals. (182 words)
