题目内容
与其他可再生能源相比，风力产生的能源比传统能源每千瓦时便宜4美分。
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虽然在美国几乎没有家庭利用风力发电，但许多能源公司允许消费者选择风力发电厂或其它再生能源产生的电力。
Boeing is the world's second largest aerospace company and leading manufacturer of commercial jetliners, defense, space and security systems, and service provider of aftermarket support.
Boeing is organized into three business units: Commercial Airplanes; Defense, Space & Security; and Boeing Global Services.
Since the Japanese attacked Pearl Harbor on December 7, 1941, and launched the Pacific war, in the next three months, it almost completely controlled the western Pacific.
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