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。

youdao

A new book, Sarah from Alaska, details how the then state governor fought tooth and nail to introduce Sen McCain on stage in his home town of Phoenix, Arizona, in the early hours of the morning.

一本名为《来自阿拉斯加的莎拉·佩林》，详细描述了在麦凯恩的家乡亚利桑那州菲尼克斯，这位当时的阿拉斯加州州长如何在清晨的几个小时里声嘶力竭地在舞台上介绍麦凯恩参议员。

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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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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