相关单词同義詞simple, defined, plane, flatland, puszta, definitely, fair, expressly, 近義詞adj. clear, obvious, visible, simple, frank n. plateau, prairie反義詞adj.indistinct, vague, difficult, indirect臨近詞plains, plaid, Plaino, Plaine, plainer, plainly, plained, plain to, Plain of, Plainard, plain CT, plain hit相似詞plague, plaice, plaid, Plaid Cymru, plain chocolate, plain clothes, plain English, plain flour, 返回 plain