bilateralism互惠主义, 双边关系原则,两侧对称bilateraladj.双边的；左右对称的bilateral lower extremity amputation双侧下肢截肢Bilateral right-sidedness sequence无脾序列征Bilateral Trade Cooperation Strategy双边贸易合作策略bilateral massive adrenal hemorrhage双侧肾上腺大量出血bilateral lower extremity prosthesis双侧假下肢bilateral negotiations and agreements双边谈判和协定bilateral investment insurance system双边投资保险制度bilateral table of detailed catalogue双向细目表bilateral cooperative model of reading阅读的双边协作模式bilateral hilar lymph node enlargement双侧肺门淋巴结肿大

1. A heat pump is a reversible system and is commonly used both to heat and to cool buildings.
   热泵一般用于建筑物的供暖与冷却的双向系统。