constant length field 常数长度栏 ; 定长栏
Constant Length 固定长度 ; 恒定长度
constant length shift method 定长移位法
bales containing constant length 定长成包
Constant length cut 定长剪切
Items in the constant pool are variable length, with the first byte of each item identifying the type of item and how it should be decoded.
常量池中各项的长度是可变的，每项的第一个字节标识项的类型以及对它解码的方式。
So, even if the speed is constant, that means, even if a length of the velocity vector stays the same, the velocity vector can still rotate.
因此即使速率不变，也就是说速度矢量的的大小不变，但它的方向可以做旋转。
The other option is to change the angle, keeping b constant. So, actually, this side stays the same length.
另外一种选择就是保持b恒定，改变角度，因此，实际上，这条边长度保持不变。
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