2.第五段

The study followed the nightly habits of some 15,659 college and high-school students, and found those who consistently went to bed after midnight had a 24 percent higher risk of depression than those who turned in before 10:00 pm.

该研究对15659名大学生和中学生的夜间作息习惯进行了追踪调查，发现那些经常在午夜后就寝的学生患抑郁症的风险比那些在晚上10点前就上床睡觉的学生高24%。

follow：追踪

两个who用来引导两个定语从句，分别修饰两个those.

1.第三段

"Our results are consistent with the theory that inadequate sleep is a risk factor for depression, working with other risk and protective factors through multiple possible causal pathways to the development of this mood disorder,"

“有理论认为睡眠不足是导致抑郁的风险因素之一，它与其他风险和保护因素相互作用，通过多种可能的

因果途径，造成这种情绪失调。我们的研究结果与这一理论是一致的。”

inadequate:形容词，匮乏的，不足的

the pathway to:通向……的小路

work with:与……相互作用

working with……disorder是现在分词短语作结果状语。

3.上交，交还

重点长难语句

2.交出，上缴；转身进入

1.转身进入；拐入；交出；上床睡觉

2.转变,变迁;变革[(+from/to)]

重点短语

1).be key to

对……是重要的

2).be consistent with

与……相协调

3). turn in

1.过渡;过渡时期

3.感知能力;洞察力[U]

7). transition

名词 n. [C][U]

2.认识,观念;看法[C][(+of)]

1.感知,感觉;察觉[U]