The heat period appears at regular intervals.

其发情期有一定的间隔时间。

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Earlier research by other scientists found that when Turkey toms were heat stressed during the last five weeks of their rearing period, the lower quality PSE characteristics surfaced.

其他科学家们所做的一项较早的研究发现在最后五周的培育期内，将雄火鸡的……，低质量肉类的PSE特征会开始显现。

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If they transmit heat to our cells, they can damage tissue over a long period of time.

如果磁场加热了细胞，就会对我们的组织造成长期性的损伤。

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And on a year-over-year basis, we expect Pfizer to have felt the full heat in the period.

FORBES: Pfizer Q4 Earnings Preview: Pain From Patent Expirations To Continue

My actions were out of frustration during the heat of the game, period.

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Mr Fowler said one example was whether a plant displayed a good degree of heat resistance during its flowering period.

BBC: 'Climate-proof' crop hunt begins