We do not yet know how to achieve the desired control during the aerodynamic phase of flight.

我们只是还不知道怎么在航行的空气动力学方面，对飞机实现需要的控制。

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When it came to online travellers, maps and flight alerts were the most desired mobile activity according to the report with 29% of travellers interested in using their mobile as a boarding pass.

对于在线用户来说，地图和航班信息提示功能是最受欢迎的手机服务，研究还同时显示，29%的旅游者对手机用作登机牌感兴趣。

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While Hansen is still a top-flight climatologist—very much worth listening to even at his most heretical—his recent foray into politics leaves a lot to be desired.

尽管Hansen仍然是一位出类拔萃的气候学家——即使是在他显得最为异端的时候也是非常值得倾听的——然而他最近心血来潮进入政界的尝试却是有待改进的。

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Technology to manage the complex pricing for packages - including the number of people and available accommodation to coincide with desired flight times - is generally not available for the web, says Mike Cogan, a partner at the travel consultancy, Equinus.

BBC: Online travel bucks gloomy trend

"Arianespace Flight 142 placed its dual satellite payload in a lower than desired orbit following a problem with the launcher's upper stage, " the statement said.

CNN: Ariane rocket puts satellites in defective orbit