Unlike earlier discoveries of similar discs, this star is still very young and so tells us planets form very early on in the life of a star.

不同于在类似尘埃盘中的早期发现，这颗恒星依然很年轻，因此让我们知道了行星是在恒星生命非常早的时期形成的。

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It is on track to be introduced in summer of 2012, and is still in the engineering phase, not early production. We suspect that poor battery life doomed the prior prototype version.

iPhone5将于2012年夏天发布，目前仍处于工程设计阶段，新机尚未产出，放弃此前原型机设计可能是因为电池续航时间不甚理想。

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This theory dictates that the factors which made early humans satisfied are still true with modern life.

该理论认为，那些令早期人类感到满足的因素，在现代生活中依然发挥着作用。

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And campaigners say she lay down many of the priorities still adopted by the contemporary early-years movement, which recognises the first three years of a child's life as crucial for its development.

BBC: Remembering Dundee's 'forgotten heroine'