It was found that the broach was locally overheated due to band segregation of carbide, and under-tempered. These factors caused fracture of broach as a result of high internal stress.

严重的碳化物带状偏析，使拉刀产生局部淬火过热和回火不足，造成内应力急剧增高，最终导致拉刀断裂。

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If your head is overheated, there's a good chance you'll yawn soon, according to a new study that found the primary purpose of yawning is to control brain temperature.

如果你的头脑过热，那么很有可能很快就打个呵欠。根据一项新的研究表明，打呵欠的主要原因就是控制大脑温度。

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Mr Meier said he found the "overheated" reaction from the English media and fans hard to reconcile with the image he used to have of the country.

BBC: NEWS | Europe | Referee under police protection

They found the naked, malnourished 4-year-old boy in an overheated apartment where he had been trapped for days with the decomposing body of his mother, a bag of sugar his only source of food.

WSJ: NJ boy found with dead mom weighed 26 pounds

Officials found that the battery for the aircraft's auxiliary power unit was incorrectly connected to the main battery that overheated.

BBC: Boeing 'set to offer plan to fix Dreamliner battery'