美国科学60秒 SSS 2012-09-06
时间：2018-12-24 作者：英语课 分类：Scientific American(九)月
英语课
This is scientific American sixty seconds science. I'm Christopher Intagliata. Got a minute?
New dads might expect to deal with dirty diapers or a baby's cries in the night. But how about lower testosterone levels? Previous research has shown that fatherhood can indeed cause a man's testosterone to dip. And that may be especially true for dads who sleep next to their babies according to a new study in the Journal 1 PloS One. Researchers studied three hundred and sixty two Filipino fathers of the same age. They took testosterone samples in 2005 and 2009. And they found that dads who slept next to junior had a third less testosterone than before, compared to dads who dozed 2 alone. The researchers can't be sure that sleeping next to the baby actually causes that decline 3. Could be that dads with less testosterone are just more likely to cuddle with the kid. But they say disruptions in a man's sleep. A baby's cry for example are known to cut testosterone production. Either way, the authors say less testosterone is probably better for baby. Because high levels of hormone 4 are linked to aggression 5, risk taking and less sympathy for an infant's cries, which at three in the morning probably won't make mom a happy camper either.
Thanks for the minute for scientific American sixty seconds science. I'm Christopher Intagliata.
1 journal
n.日志，日记；议事录；日记帐；杂志，定期刊物
- He kept a journal during his visit to Japan.他在访问日本期间坚持记日记。
- He got a job as editor of a trade journal.他找到了一份当商业杂志编辑的工作。
2 dozed
v.打盹儿，打瞌睡( doze的过去式和过去分词 )
- He boozed till daylight and dozed into the afternoon. 他喝了个通霄，昏沉沉地一直睡到下午。 来自《现代英汉综合大词典》
- I dozed off during the soporific music. 我听到这催人入睡的音乐，便不知不觉打起盹儿来了。 来自《简明英汉词典》
3 decline
n.衰微，跌落，下降；vt.使降低，婉谢；vi.下降，衰落，偏斜
- I must decline to show favour to any of the candidates.我必须拒绝偏袒任何一位候选人。
- The birthrate is on the decline.出生率在下降。
4 hormone
n.荷尔蒙，激素，内分泌
- Hormone implants are used as growth boosters.激素植入物被用作生长辅助剂。
- This hormone interacts closely with other hormones in the body.这种荷尔蒙与体內其他荷尔蒙紧密地相互作用。
5 aggression
n.进攻，侵略，侵犯，侵害
- So long as we are firmly united, we need fear no aggression.只要我们紧密地团结，就不必惧怕外来侵略。
- Her view is that aggression is part of human nature.她认为攻击性是人类本性的一部份。