相关单词同义词simple, defined, plane, flatland, puszta, definitely, fair, expressly, 近义词adj. clear, obvious, visible, simple, frank n. plateau, prairie反义词adj.indistinct, vague, difficult, indirect临近词plains, plaid, Plaino, Plaine, plainer, plainly, plained, plain to, Plain of, Plainard, plain CT, plain hit相似词plague, plaice, plaid, Plaid Cymru, plain chocolate, plain clothes, plain English, plain flour, 返回 plain