n booster
n助推器
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Annan's visit to the Afghan capital is the first by a U.N. chief in more than 40 years and is seen as a morale booster to the post-Taliban government and peacekeepers working there.
CNN: U.N. sets course for Afghan elections
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