英语翻译The above cuts through the hull are sufficient for defin

英语翻译
The above cuts through the hull are sufficient for defining the shape,
but another two families of cuts are usually added,to aid in the visual
perception of the body.Buttocks are introduced in the profile plan,
showing vertical,longitudinal cuts through the hull at positions
indicated in the half breadth plan .The diagonals in the lower part of
the half breadth plan are also quite important.They are obtained by
cutting the hull longitudinally in different inclined planes,as indicated
in the body plan.The planes should be as much as possible at right
angles to the surface of the hull,thus representing its longitudinal
smoothness.In practice,the flow tends to follow the diagonals,at least
approximately,so that they are representative of the hull shape as `seen'
by the water.Special attention should be paid to the after end of the
diagonals,where knuckles,not noticed in the other cuts,may be found,
particularly on IOR yachts from the 1970s and the 1980s.Almost
certainly,such unevenness increases the resistance and reduces the speed
of the yacht
The other line in the lower part of the half breadth plan is the curve of
sectional areas,representing the longitudinal distribution of the submerged
volume of the yacht.The value at each section is proportional to the
submerged area of that section,while the total area under the curve
represents the displacement (volume).A more detailed description of the
construction of the curve of sectional areas will be given in Chapter 4
In order to define exactly the shape of the hull a table of offsets is
usually provided by the designer.This is to enable the builder to lay out
the lines at full size and produce his templates.Offsets are always
provided for the waterlines.but the same information may be given for
diagonals and/or buttocks also.Note that all measurements are to the
outside of the shell

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再答： 通过削减船体以上定义形状足够了，但另外两个家庭的削减通常说，可帮助身体的视觉感知。 臀部在配置文件中提出的计划，显示垂直，纵向通过在船体削减了一半广度计划表明立场。一半在广度计划下部的对角线也很重要。 他们获得了在不同倾斜切割在体内计划表明飞机，船体纵向。 这些飞机应该是在正确的角度尽可能的船体表面，从而代表其纵向畅通。 在实践中，往往会流走对角线，至少约，让他们看到为`时应注意的water.Special'的船体形状代表后的对角线，如指关节，没有注意到结束在其他的削减，可能会发现，特别是从20世纪70年代和80年代IOR的游艇。 几乎可以肯定，这种不平衡增加了阻力，并减少对游艇的速度，其他线在广度计划的一半下部是截面面积曲线，在每个代表的价值潜量的yacht.The纵向分布部分是成正比的那部分淹没区，而曲线下的面积代表位移（卷）。 一对曲线的截面面积建设的详细说明将刊载于第4章，为了准确定义的一个偏移表通常是由设计师提供的船体形状。 这是为了让建设者打下了全尺寸的生产线和他的模板。 偏移量总是提供了水纹。 但相同的信息，可给予对角线和/或臀部也。 请注意，所有测量都到外面的外壳