opportunityn.机会;时机
opponentn.对手;反对者;敌手adj.反对的;敌对的
opportunelyadv.恰好地适当地.
opportune time有利时机
opportune rain及时雨
opportune cost机会成本
opportune moment时机
opportune firing射击有利度
opportune thinning适度间苗
opportune confabulation适机虚谈症
opportune moment for interrogation审讯时态
opportune water replenishing policy相机补水政策
"an opportune place to make camp""an opportune arrival"