In the listening material, the professor made several points that the idea salvage logging is beneficial both to damaged forest and to the economy is questionable.
First, cleaning up dead trees by forest fires and severe storms is not beneficial for trees to grow. In fact, after a devastating fire, there are many dead trees to decompose, as a result, nutrition decomposed can enrich the soil which have the benefits for (is beneficial to) the generation of new trees. Removing the remains of dead trees can not have (provide) the necessary nutrition to trees growth.
Second, it is true that dead trees take up space, but it makes birds and other insects to have a suitable habitat, not only the harmful insects, which is beneficial to the long term (development of) forest. On the contrary, removing rotting wood is more harmful to the health of forest than insects do.
Third and last, the economic benefits are very small and don't last a long time. The expenses used to transportation for the sake of removing and maintaining dead trees are high and the jobs created by salvage logging are temporary. So the salvage logging can not bring large benefits. This is where the speaker disagrees with.
听力的内容基本都听到了,表述上有一些地方还有点问题,总体上还是不错的,加油!~
As people's material life is more and more abundant, people have more choices of (for) eating habits. They are able to choose the most healthy (healthiest) life style. However, at the same time, a number of people have developed unhealthy eating habits. Some hold the opinion that advertising is the main cause to unhealthy eating habits, but from my perspective, I can't disagree (agree) with the idea with the following reasons.
First of all, advertising supplys people of (with) food introductions, but are (is) unable to decide for people whether to eat or not. There is no denying that the food which seem to be delicious in advertising is easy for people to buy and eat. Sometimes, many people including me can't resist the temptation of good food. However, advertising makes it impossible for people to lead an unhealthy eating habits to the sake of eating delicious food. Our surroundings fulfill (are filled with) various kinds of advertising, not only for food, but also for clothes, books, decorations and so on. There are so many lures in the world, but it can't be the reason to develop the bad habits which people can not stop purchasing or eating.
What's more, advertising is inevitable existent in the fast developing society nowadays. In order to satisfy many different kinds of demand for people, productions are more and more (the number of productions is increasing).That leads to the prosperous and competitive market, and advertising is a good way to sell their productions to the largest degree. On the other hand, unhealthy eating habits are there all the time from the human beings appeared. So advertising can't be the main cause to unhealthy eating habits. There must be some other reasons to unhealthy eating habits. For example, people have more and more rich (richer) night life, so they may not have regular life. That is a must to lead to unhealthy eating habits because people would eat snacks and drink unlimited.
个人认为本段前半段与主题没有关系。。。
To sum up, advertising is not possible the main reason to unhealthy eating habits, because it is impossible a determinant for people eating unhealthily and is a necessary production of markets.