He retired from Penn State in nineteen ninety-nine, and has denied the charges.
他于1999年从宾夕法尼亚州立大学退休，并否认了这些指控。
But it represents a loss of about five hundred ninety thousand kilometers from the yearly average between nineteen seventy nine and two thousand.
但是从1979年到两千年每年的平均数值来看，这也说明了大约五十九万平方公里的冰川消失了。
I have been doing this since nineteen ninety-nine, which makes this the ninth month and next month the tenth.
从1999年开始我一直在做这件事，这已经是第九个月了，下个月就是第十个月了。
I have been doing this since nineteen ninety-nine, which makes this the ninth month and next month the tenth.
从1999年开始我一直在做这件事，这已经是第九个月了，下个月就是第十个月了。
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