m But I think B and A have the same meaning, so I think both are right. Please explain it to me You cannot solve such questions on dictionary meaning alone, because English is too full of collocations. 'Crude calculations', or actually better, 'rough calculations' are natural utterances.
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Ti?u C?mBut I think B and A have the same meaning, so I think both are right. Please explain it to meYou cannot solve such questions on dictionary meaning alone, because English is too full of collocations. 'Crude calculations', or actually better, 'rough calculations' are natural utterances. 'Raw' is a possibility not used, but 'rude' is not appropriate at