Mr Obama's trip predictably failed to produce breakthroughs on either issue, though a lengthy joint statement outlined measures to step up co-operation on developing clean energy.
正如前期所料，这两个问题，在奥巴马此次访华之旅中难以得到任何突破性进展，尽管中美双方就共同研发清洁能源的措施草拟了一份详尽的联合声明。
It gives us another compelling reason to step up existing control measures with the greatest sense of urgency.
它为我们提供了具有说服力的又一个理由，促使我们以更大程度的紧迫感加强现有控制措施。
It gives us another compelling reason to step up existing control measures with the greatest sense of urgency.
它为我们提供了具有说服力的又一个理由，促使我们以更大程度的紧迫感加强现有控制措施。
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