Annihilating dark matter at the heart of the Milky Way could account for signals detected by two space telescopes, according to a pair of US physicists.

据两位美国物理学家称，银河中心暗物质湮灭的这一设想，可以解释近年来两台空间望远镜探测到的信号。

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(Acquisitions by firms in Brazil and India are part of a more even two-way flow of capital with the rich world.) by contrast, America funds its current-account deficit by selling assets to foreigners.

(巴西和印度对富国公司的收购更多的是与富国之间的双向流动)，与此形成对比的是，美国需要对外出售资产以弥补其流动性的不足。

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In this new era, when emerging markets account for two-thirds of global growth, concerted action by the G-20 is the only effective way to confront the challenges that lie ahead.

在这一新时代，新兴市场的贡献占全球经济增长的三分之二，20国集团联手行动面对未来挑战是唯一的有效办法。

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For a platform billing itself as the business user's best friend, BlackBerry's list of unsupported protocols that have achieved ubiquity is actually astonishing: you can't do two-way read status sync with an IMAP email account, for example, and amazingly, you can't natively connect to an Exchange ActiveSync service without being routed through RIM's back-end software.

ENGADGET: RIM's BIS 3.0 email features apparently leaked, finally does Gmail justice

And this is a two-way street -- the hosts get to size you up, too, through your online account.

CNN: Staying in a stranger's home: A field test