装有双发动机的 two engined ; twin engined
发明双赢的挑选 Invent options for mutual gain
双发动机的 twin engine
发病的双重发病学说 dual pathogenesis theory ; DPT
双联发电机的用途 dual generator application
启发式的双向搜索算法 Heuristic BiDirectional Searching
双发停车的飞行状态 two-engine-out condition
无刷双馈感应的发电机 BDFIG
但是在比分来到5 - 5的时候，费雷尔两次击球下网，并送出一个双误—第二发球出了发球线超过一英尺—让穆雷取得了破发。
But serving at 5-5 Ferrer hit two shots into the net and then double-faulted — missing the second serve by more than a foot — to give Murray the break.
但是在比分来到5 - 5的时候，费雷尔两次击球下网，并送出一个双误—第二发球出了发球线超过一英尺—让穆雷取得了破发。
But serving at 5-5, Ferrer hit two shots into the net and then double-faulted — missing the second serve by more than a foot — to give Murray the break.
伊朗考古学家日前宣布，他们在伊朗东南部发掘出一个西洋双乐棋(又称十五子棋)棋盘，这是迄今为止世界上发现的最古老的西洋双乐棋盘，这一发现将很有可能使伊朗成为全世界棋盘游戏的发祥地。
Archaelogists in Iran have said they have uncovered what they believe is the world's oldest backgammon set, which could make the country the cradle of board games.
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