F1 tyres have an optimum operating temperature, and when they drop below that they rapidly lose grip, which dramatically slows lap times.

F1赛车的车胎对环境温度有要求，当温度低于底限时候轮胎就会失去抓地力，这会大大减慢圈速。

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They work by absorbing extra thermal energy in the drink when it's too hot, and then releasing that stored energy back into the drink to keep it at an optimum temperature as it begins to cool down.

金属咖啡豆的工作原理是在饮品温度过高时吸收多余热量，并在饮品开始冷却时释放储存的热量。

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Do you know the optimum temperature for the growth of plants?

你知道植物生长的最佳温度吗？

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When they separate, the primers that you've added automatically bind through the process of hybridization, and then you turn up the temperature to the optimum for Taq polymerase and DNA synthesis starts.

当双链解旋后,加入的引物就会在杂交的步骤中自动,和解旋后的DNA结合,然后你再将温度升高至,Taq酶的最适温度,DNA就开始合成了

耶鲁公开课 - 生物医学工程探索课程节选

That would keep their muscles at the optimum operating temperature and allow them to play for longer.

ECONOMIST: Athletics

The high temperatures which have hampered Red Bull at the Hungaroring could play into the hands of title rivals Brawn, who have struggled to get optimum tyre temperature in the cool conditions of the last two races.

BBC: Hamilton top as McLaren set pace