accurate, correct, exact, precise
accurate准确的,精确的。如:Clocks in railway stations should be accurate.(火车站的钟应该是准确的。)
correct“正确的”,指符合一定的标准或准则,含有“无错误的”意味。它的反义词是incorrect, wrong.
exact“精确的”,“恰好的”,比“大体上正确”更进一步,表“丝毫不差”。它的反义词是inexact。
precise强调“精确”,“精密”。