AAA27集思广益中参加讨论提高自己惠及他人

A27. The following appeared as part of an editorial in the Doddsville News.
“Last year’s accidental introduction of a species of algae-eating fish into nearby Grand Lake has dramatically cleared the lake’s once-murky waters. Since then, the number of swimmers at Grand Lake’s beaches has increased by 23 percent. Given this success at Grand Lake, Doddsville should introduce algae-eating fish into Emerald Lake. Emerald Lake is already a popular place for fishing, but improving the water there will attract additional tourists interested in swimming and boating. The result will be an increase in business and profits for Doddsville hotels and merchants.”

1Other factors that may contribute to the clearance of the nearby Grand lake should be considered and ruled out.
2Whether the two lakes are exactly the same is still open to doubt. Therefore the approach that is practical in the nearby Grand lake may not work for Emerald lake.
3The other aspects of the introduction of algae-eating fish into Doddsville are not considered therefore makes the application of the suggestion open to doubt.
4It is possible that even if the Emerald lake's water is clearer than before, people will still not come to boat and swim because of other factors.   

很好诶~~~~