But it does suggest feathers may have helped promote life in the trees, even for creatures that could not actually fly.

但是，这的确说明对于居于树上、即使是那些根本不能飞的树栖生物来说，羽毛可能真的有助于它们的生活。

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Some airline safety experts say the shortage could pose risks because pilots may be made to fly more routes and new pilots do not have enough flying experience.

有民航安全问题专家指出，飞行员短缺可能会带来飞行员飞行时间增加、以及新飞行员缺乏飞行经验等问题，进而会构成安全隐患。

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Sources close to the programme told Jane's that "the end of the year deadline may not be met, but the aircraft will fly very soon - either before the end of 2010 or just after the new year".

接近该项目的消息人士告诉简氏“可能无法实现年底这一期限，但该机将很快试飞 ——不是2010年底就是新年过后”。

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They may not push back but may quietly fly the coop if it becomes too unpleasant or too expensive.

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The fly-half may not have been in the best of form going into the game but he was playing beautifully and nearly set up a third New Zealand try with a lovely dummy through the England midfield.

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"Bats are about the size of mice and they have very small teeth, and so if you have a bat fly into you or bump you, that bat may have just bitten you and you may not appreciate it, " he says.

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