Moreover, there remains the question of how a residual American-led force, even if sizable, could make a difference in Afghanistan, given that a much larger force failed to secure a clear victory over the past 13 years. Obama has offered no answer.
此外，还有一个问题是以美国为首的留驻军队（即使规模不小）是否能给阿富汗带来不同，因为原先大得多的军队也没有在过去13年里确保明确的胜利。奥巴马并未给出答案。