鲤鱼过多成问题，美国官员找对策。

Hints:
the Great Lakes
Michigan
Mississippi
Midwest
Utah
Provo
June sucker
The barrier, however, may not be enough to protect the Great Lakes. There are calls in Congress for emergency action. Officials could close shipping connections between Lake Michigan and the upper Mississippi River system. But there are no decisions yet. So that is the situation in the Midwest. Fart…
然而，这种关卡也许并不足以保护五大湖。国会传出呼声，要采取紧急措施。政府可能会关闭连接密歇根湖和密西西比河上游的航运通道，但最终决议尚未出台。 中西部地区的情况也是如此。再往西去，问题的症结就在于普通鲤鱼了。犹他州的官员希望移走犹他湖里3/4的鲤鱼。该湖位于普罗沃附近，是犹他州最大的天然淡水湖。 犹…