【英语时差8,16】母婴联系（上）

However, the observation that morphine can decrease social behaviors as well prompted scientists to investigate the connection between the opioid system and social relationships. They compared normal baby mice to baby mice lacking a crucial opioid receptor. What they found was that while normal baby mice who have been separated from their mothers make distressed² noises, baby mice that lack the crucial opioid receptor exhibit significantly less distress¹ when mom’s away.

1 distress   

n.苦恼，痛苦，不舒适；不幸；vt.使悲痛

参考例句：

• Nothing could alleviate his distress.什么都不能减轻他的痛苦。
• Please don't distress yourself.请你不要忧愁了。

2 distressed   

痛苦的

参考例句：

• He was too distressed and confused to answer their questions. 他非常苦恼而困惑，无法回答他们的问题。
• The news of his death distressed us greatly. 他逝世的消息使我们极为悲痛。