So the investigators speculate that males might synchronize to a single common pitch as a sort of mating beacon.

因此科学家们推测雄性蓝鲸们也许会一致地发出同一种单一频率的叫声作为求偶的信号。

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Perhaps a genetic predisposition for absolute pitch is more common among Asian populations.

也许音高辨别力的基因素因在亚洲人中更加普遍。

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Piano, a common but special instrument with a "fixed pitch", requires an "absolutely" precise intonation relation.

钢琴是一件常见而特殊的“固定音高”乐器，必须具备“绝对”准确的音准。

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Promises of free vacation tickets or maybe a free TV if you sit in on a time-share sales pitch are common.

CNN: Watch out for the 'free' stuff

Here are the famous, the obscure and the anonymous, children, lovers and nutters, all of whom, for different reasons, have one thing in common: they must pitch in.

ECONOMIST: Reading habits

And like every network executive who took to the stage this week, Ostroff made a point of emphasizing her company's desire to work the Web into their business --the now-common "multiplatform" pitch.

FORBES: CW's Deja Vu