Experts believe the collision should produce a dark debris field in Jupiter's clouds-similar to the previous impact site-which may become visible over the next few days.

专家们相信这次撞击会在木星的云层中制造出一块可以在接下来几天里持续观测到的深暗色碎片区，就像之前的撞击所留下的痕迹一样。

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In these new studies, Reddy's team incubated purified red blood cells from healthy volunteers in the dark and at body temperature and sampled them regularly over several days.

在这些新的研究中，雷迪团队的项目相当有建设性，他们正酝酿着从那些健康的志愿者身上提取红细胞(前提条件：在黑暗中，正常的体温)，然后进行一段时间的取样研究。

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He is widely revered for his forthrightness and his leadership of Porsche, from the dark days of near-bankruptcy in 1993 when he took over, to years of growth and glowing results today.

他凭借自己直截了当的工作作风和对保时捷成功的管理赢得了广泛的敬畏。他在1993年接手保时捷时，厂子暗淡无光、频临破产，在他的领导下，企业起死回生，成长为今天光辉夺目的汽车厂商。

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There was also that good news from the European Central Bank this week, announcing that a good chunk of the emergency lending it had offered to European banks in the dark days of the eurozone crisis just over a year ago was being repaid early.

BBC: Davos 2013: A 'sigh of relief' at the World Economic Forum

This is political territory unknown for a generation or two, after all the last coalition that Britain had was during the dark days on the World War II, over 60 years ago.

FORBES: Britain's Twofer: Vote For One Party, Get Two

For a variety of reasons, these are dark days for journalism, with the public's appetite to hand over money in return for quality reporting apparently in inexorable decline.

BBC: Good news - journalism matters