Obama has said he wants US combat troops out of Iraq in 16 months, as long as withdrawal does not endanger either the gains made there or the Americans left behind to provide training.

奥巴马已经说过他希望美军战斗部队在16个月以内从伊拉克撤回，只要撤回不会威胁已经取得的成果以及那些留下来从事提供培训的美国人。

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But on the war in Iraq, U.S. officials say American combat brigades could be reduced by half, if current security gains allow for the drawdown to continue at its current pace.

但是，在伊拉克战争中，美国官方说如果现行安全措施进一步允许削减开支，美国战斗部队可能锐减至一半。

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Second, he said that Microsoft's programs to combat piracy of Windows, which had bolstered sales in the previous couple of quarters, did not generate revenue-increasing gains this time.

第二点，他说，微软原先赖以提升其在原有大市场上的销售收入的打击视窗盗版计划，这回却没有助它提升销售收入。

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Based on all this, and on the further progress we believe we can achieve over the next few months, I believe that we will be able to reduce our forces to the pre-surge level of brigade combat teams by next summer without jeopardizing the security gains that we have fought so hard to achieve.

CNN: Transcript of Iraq hearing statements