In a bid to challenge foreign giants Airbus and Boeing - owned by France and America respectively - China is expected to finally 'realise its blue-sky flight dream' with its single-aisle C919 jet.

为了挑战国外巨头法国的空客和美国的波音，中国期待这款单通道机型的C919喷气式客机“最终实现翱翔于蓝天”的梦想。

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Something happens out of the blue and you don't have much time to think about it, so remember: whatever anything happens, don't evade it, but treat it as a challenge.

发生的蓝色和你没有多少时间去想它，所以记住：无论发生什么事，不要躲避它，但是把它当作挑战。

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The Blue Button challenge has empowered tens of thousands of Americans and seeded a growth industry that should help lower healthcare costs and improve quality.

WHITEHOUSE: Health Care Blog | The White House

More advanced divers will be lured to the challenge of the Blue Hole dive site just north of town.

BBC: Red Sea diving: Alternatives to Sharm el-Sheikh

Mercer expressed the wish after the Blue Sox's narrow Challenge Cup defeat in March that his side could play Bradford every week, so confident was he of ending their unbeaten record.

BBC: Bulls mock Blue Sox