The difference between the measurements is independent of a constant determinate error.
测量之间的差异与恒定测定误差无关。
2
Writing that constant over and over again is tedious at best, and error-prone if you try to type it in each time by hand instead of cutting and pasting the value.
一直重复写这个值最多只是乏味，但如果你每次都手动输入而不是采用复制、粘贴，那么很可能会出错。
3
Also as the name says, implicitly typed local variable, you cannot use var for field declaration or constant variables, therefore following declarations will both produce a compiler error.