We sell it by the long dozen.

我们卖一打赠一个。

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The shop sells it by the long dozen.

这家商店出售它的长打。

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The Keck Observatory has been invaluable in detecting extrasolar planets, worlds around other stars that were long postulated but only detected in the last dozen years or so.

近十几年来，人类开始探测到其他恒星周围的行星，在探测太阳系以外行星的过程中，凯克望远镜具有不可估量的的价值。

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But in a spring and summer of surprises, they did displace at least a half-dozen long-time incumbents.

WSJ: Rebel Movement Takes Center Stage

This fall, I had half a dozen long conversations with Steven Donziger about his time in Ecuador and his battle with Gibson, Dunn.

NEWYORKER: Reversal of Fortune

And all night long, nearly two dozen rescue workers have been riding the boats up and down these lanes and pulling out people from their homes.

CNN: Udoji: Katrina survivors 'screaming for help'