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huangyi:oprand #1 TRAY(wav=2,Hy=a,Py= b); D8C@x` oprand #2 TRAY(wav=2,Hy=a,Py= -b); nW!rM($q SUMM(oprand #1,oprand #2)其中SUMM描述的是上述两个操作数的代数和,表征彗差的大小。 (2011-04-13 16:27) lmo>z'<
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