The agreement, which was penned in Washington DC, gives the green light to scientists and engineers to begin the joint planning of Red Planet missions.
这项在华盛顿签署的协议，为科学家和工程师们联合开展火星项目提供了渠道。
A baby red panda was born at the US National Zoo in Washington, DC on 16 June.
6月16日，一只小红猫熊在位于华盛顿的美国国家动物园降生。
A baby red panda was born at the US National Zoo in Washington, DC on 16 June.
6月16日，一只小红猫熊在位于华盛顿的美国国家动物园降生。
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