Since November 2009, when traces of the fish were found near Chicago, federal and state officials have used nets, electric shocks and poison to keep them out of the Great Lakes.
年11 月，在芝加哥附近发现了掠食性鱼种，联邦和州官员使用捕鱼网，电击和投毒等方式，希望能把这些鱼类从五大湖区剔除掉。
In the 1990s federal and state regulators agreed to make state limits more uniform for the Great Lakes' most toxic pollutants; Congress is now considering a bill to promote further collaboration.
90年代联邦和州级管理部门同意由各州尽可能统一限制五大湖最具毒性的污染源；国会现正讨论一项促进各州进一步合作的提案。
The awful truth dawned only after a second opinion, by Zak Pretorius of the University of the Free State in South Africa: stem rust had not only lived on in a remote corner of Africa's Great Lakes.
这一可怕的事实最终被南非自由州大学的ZakPretorius的一个提议所证明——茎锈病不仅仅存活于非洲大湖区的偏远角落，他已经进化并击败了曾经不败的Sr31。
The awful truth dawned only after a second opinion, by Zak Pretorius of the University of the Free State in South Africa: stem rust had not only lived on in a remote corner of Africa's Great Lakes.
这一可怕的事实最终被南非自由州大学的ZakPretorius的一个提议所证明——茎锈病不仅仅存活于非洲大湖区的偏远角落，他已经进化并击败了曾经不败的Sr31。
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