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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Fully 85% of your happiness will be determined by the quality of your relationships at each stage, and in each area, of your life.

人们在任何一个人生阶段或居住在任何一个地区是否觉得幸福快乐，其中有百分之八十五取决于融洽的人际关系。

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There were differences -- long-term romantic love lit up many more brain regions than early-stage love -- but both groups showed significant activity in the dopamine-rich ventral tegmental area.

也有一些不同——长期的浪漫爱情会比短期爱情调动大脑的更多区域，但是两组都检测到了多巴胺富集的腹侧被盖区的重要活动。

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Just two months ago, NEA launched the Experiment Fund at Harvard University to invest in very early stage companies in the Boston area.

WSJ: 'Pivoting' Pays Off for Tech Entrepreneurs

If Portugal's request was predictable, the outcome of this latest stage in the euro area's sovereign-debt crisis is less easy to gauge.

ECONOMIST: Portugal seeks help

However, what they could have foreseen was the storm that sent the stage down particularly because the National Weather Service had declared a severe thunderstorm warning in the area 10 minutes before the stage fell.

FORBES: Indiana State Fair Stage Collapse, a Youth Softball Siren, and Respecting the Weather