It varies with the square of distance so it goes - in order to go twice as far it takes four times as long.

速度是与距离的平方正相关的--,如果要扩散两倍的距离要多花四倍的时间

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But there are important areas where Apple refuses to go with the times.

FORBES: Move up http://i.forbesimg.com t Move down

This was later corrected to Hispanic before the New York Times chose to go with the label white Hispanic, perhaps because it fit better with the sensationalist image of a racist gated community.

FORBES: Redefining Race and Ethnicity In the Shadow of the Trayvon Martin Shooting

Voters may factor this in, but they may be more likely to go with the Peter Robinson "times are hard enough as they are" line.

BBC: NI Assembly election campaigning - state of play so far