求翻译：评级机构还使得一些公司倒闭和造成巨大损失，以至于评级机构被一些人称为“黑嘴”。三大评级机构对欧债危机的蔓延以及难以解决有着不可推卸的责任。是什么意思？

Rating agency also makes a number of corporate failures and caused huge losses, so that some rating agencies are called "black mouth." The three major debt rating agencies crisis spread to Europe as well as difficult to solve with an inescapable responsibility.

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The rating organization also causes some companies to go out of business and to create the heavy loss, the rating organization is called by some people “the black mouth”.Three big rating organizations as well as with difficulty solve the responsibility to the European debt crisis spread which has ca

Rating agencies also makes a number of company closures and causing huge losses, that rating agencies by some as the "black mouth". Three major rating agencies to the spread of European debt crisis and the difficulty of solving has an unshirkable responsibility.