In all, a ketch carries about the same total square footage of sail area as a sloop of the equivalent size.
总而言之，一艘双桅帆的总体帆面面积和一艘同样尺寸的单桅帆差不多。
The primary advantages of a ketch are that each of the sails is usually somewhat smaller than on a sloop of equivalent size, making sail handling easier.
双桅帆的主要优势在于每一面帆都比同尺寸的单桅帆船上的相应帆尺寸要小一些，使得航行操纵也容易一些。
This paper presents a path planner in the way of circuit map for the tractor-trailer robots on the basis of equivalent size.
采用电路映射地图进行环境建模，在等效尺寸的基础上对带拖车移动机器人的路径规划进行研究。
This paper presents a path planner in the way of circuit map for the tractor-trailer robots on the basis of equivalent size.
采用电路映射地图进行环境建模，在等效尺寸的基础上对带拖车移动机器人的路径规划进行研究。
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