If your foot points down, you need to measure the distance between the top of your big toe and an imaginary line from the bottom of your heel.
如果你的脚底朝下，那么你需要测量你的脚后跟到你大脚趾所在垂线的最短距离。
The Bore is the diameter of the cylinder. The stroke is the distance the piston travels from BDC (Bottom dead center) to TDC (top dead center). The Bore is always mentioned first.
内径指的是气缸的直径；行程是活塞从下止点运行到上止点的距离。表述时，内径总是写在前面。
Consider each individual stock. And determine its trend from its position according to distance in time from bottom or top.
考虑每只个股，根据其从顶部或底部开始的时间长短的位置，确定其趋势。
Consider each individual stock. And determine its trend from its position according to distance in time from bottom or top.
考虑每只个股，根据其从顶部或底部开始的时间长短的位置，确定其趋势。
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