同样一段距离，企鹅以其摇摆的方式来行走，所消耗掉的体能是其他同体型动物的两倍之多。
To waddle a given distance, penguins use twice as much energy as other creatures of the same size use to walk equally far.
还有，免费版本的视频解析度以及帧速也提升了两倍之多。
In addition, the video resolution and frame rate have also been doubled in the free version.
文本格式的XML消息可能是二进制数据带宽量的两倍之多。
XML messages in text format could more than double the amount of bandwidth of binary data.
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