At this stage, the tooth can repair the weakened area with the help of fluoride and minerals in saliva.

在这个阶段，牙齿可以借助唾液中的氟化物和矿物质修复脆弱的部位。

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The single stage skewed tooth cylindrical gears reduction gear optimized design, is a multi-objective optimization question.

单级斜齿圆柱齿轮减速器的优化设计，是一个多目标优化问题。

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Human tooth development is a consecutive process, which includes bud stage, cap stage, bell stage and tooth root development.

人类牙齿发育是一个连续的过程，经历了蕾状期、帽状期、钟状期和牙根发育期。

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Left untreated, what's termed "early dental caries" -- the first stage of tooth decay -- can destroy tiny teeth and lead to infection, pain, and lifelong consequences.

CNN: Baby's teeth: What you should know

While it can be fun to run through a stage as fast as possible, it is more enjoyable to thoroughly examine each level with a fine-tooth comb, searching for extra coins, extra green mushrooms, new pathways, and other hidden goodies.

FORBES: Connect