词汇表 second nature 第二天性；习性

at the mercy of 任凭…的摆布，完全受…的支配

constant 连续不断的

hormone 荷尔蒙，激素

metabolism 新陈代谢

rhythm （人的生物）节奏，规律

cogs （齿轮的）嵌齿

pendulums 钟摆

trio 三人组

circadian rhythm 昼夜生理节律

jet lagged 有时差感的

out of sync 不同步的

测验 请听报道并回答下列问题。

1. True or false: the strength of emotions, hormone levels, body temperature, metabolism and even the risk of a heart attack all fluctuate in a daily rhythm.

2. What keeps our body’s time?

3. What can the long-term disruption of circadian rhythms cause?

4. Which word in the text means “watch or clock”?

答案 1. True or false: the strength of emotions, hormone levels, body temperature, metabolism and even the risk of a heart attack all fluctuate in a daily rhythm.

True. According to the report, mood strength, hormone levels, body temperature, metabolism and even the risk of a heart attack all fluctuate in a daily rhythm.

2. What keeps our body’s time?

It's the swing in gene activity over 24 hours that keeps our body's time.

3. What can the long-term disruption of circadian rhythms cause?

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