People who have a greater sense of purpose usually have better physical and mental health, which in turn explains their higher-quality sleep.

目标感更强的人通常身心更加健康，这反过来解释了他们睡眠质量更高的原因。

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Brain development in girls occurs much earlier than in boys, which partially explains why they do better earlier.

女孩的脑部发育要早于男孩，这部分解释了为何女孩很早就比男孩学习出色。

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"Business is getting better and better each year," explains Kuai Liangyou, taking a moment of temporary silence as an opportunity to talk.

“生意一年年的好起来，”蒯良友沉默了一会儿后解释说，似乎在等说话的机会。

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More than 200 individuals and organizations were nominated this year, but as Jagland explains, Barack Obama won for giving the world hope for a better future and for striving for a nuclear-free world.

VOA: standard.2009.10.09

There had better be something that explains, that's controlling, the motions of the missile.

最好存在某种东西可以解释,是什么控制着导弹的运动

耶鲁公开课 - 死亡课程节选

So the environment has changed in a short time but evolution has not and there's a real mismatch now, which explains why you probably like Haagen-Dazs better than you like cauliflower.

所以食品环境在短时间内就能改变,但是进化不能 于是就有了错位,这也就能解释为什么哈根达斯,比菜花更受欢迎

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

According to the researchers, the lifestyle led by wine-drinkers explains much of their better health.

ECONOMIST: Alcohol and health

Chris Struhar, tech lead, explains how Facebook is offering a better choice of feeds that you see.

FORBES: LIVE: Facebook Launches New News Feed Design With Bigger Images, Choice Of Feeds

"The more motion I am in the better, " she explains.

BBC: Holiday cruise left woman feeling permanently seasick