Here is the U.S. Bureau of Transportation Statistics' tally among the top 10 U.S. carriers in collecting ancillary-fee revenue in the fourth quarter of 2009.

以下是美国交通统计局发布的2009年第四季度美国十大航空公司辅助收入统计。

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At $157.2 million, Southwest came in fourth among U.S. airline ancillary-fee collectors, according to a tally released May 3 by the U.S. Bureau of Transportation Statistics.

西南航空以1.572亿美元的辅助服务收入居于美国航空公司辅助收入排名中的第四位，数据来源于在5月3日由美国交通统计局（U.S. Bureau of Transportation Statistics）发布的数据年鉴。

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