He argues that tooth crowns and roots have a high genetic component, minimally affected by environmental and other factors.

他认为，牙冠和牙根有很多的遗传成分，受环境和其他因素的影响很小。

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High temperatures can destroy biofilms, as can some chemicals, but neither approach is safe to use inside the delicate interior of a human tooth.

和一些化学物质一样，高温也能够破坏生物膜，但在这两种方法都不安全。

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High efficiency DC brushless motor, micro chip processor control, tooth synchronous belt drive, smooth operation, noise.

高效直流无刷马达，微芯片处理器控制，齿行同步皮带传动，运行平稳，噪音极底。

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For an individual with a sweet tooth, getting around a high soda tax would require neither genius nor brash acts.

WSJ: Michael Marlow: The Skinny on Anti-Obesity Soda Laws

He said there were also "major areas of challenge" including disappointing breast feeding rates, large variations in preventable tooth decay in children, high death rates from lung diseases and a large amount of preventable cancers and cardiovascular disease.

BBC: Guernsey health profile released

Dental health experts say tooth decay in children remains too high despite latest figures which show a decrease in the number of five-year-olds with problems.

BBC: Tooth decay in children too high, says chief dental officer