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v.使上下(来回)摇动( seesaw的过去式和过去分词 );玩跷跷板,上下(来回)摇动; 英英释义: seesaw[ 'si:sɔ: ]n.a plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end同义词:teeterteeter-totterteetertotterteeterboardtilting boarddandle boar