【英语时差8，16】自杀
时间：2015-10-19 05:50:18
搜索关注在线英语听力室公众号：tingroom，领取免费英语资料大礼包。
（单词翻译）
In the United States someone attempts suicide every minute. In a single day roughly eighty Americans kill themselves. What compels so many people to end their lives prematurely1? Countless elements factor into the fatal decision that leads to suicide. In recent years, however, scientists have been searching for an underlying2 biological explanation. Although not conclusive3, the most compelling evidence points to irregularities in a brain chemical called serotonin.
Serotonin is a neurotransmitter, meaning that it travels between neurons in the brain to relay chemical messages. When neurons communicate they release serotonin into the space between neurons called the
synapse4. After the serotonin has delivered its message, the neuron sending the serotonin reabsorbs the chemical. Besides working as a chemical messenger, serotonin seems to sooth the mind. Antidepressant drugs such as Prozac work by causing serotonin to remain in the
synapses5 longer before being reabsorbed, thus having an even greater calming effect.
Several studies have linked suicide to low levels of serotonin in the brain. Scientists have
determined6 that the brains of at least some suicide victims had tried to
horde7 serotonin by not allowing it to be reabsorbed into the synapse. While low serotonin levels alone do not cause someone to commit suicide, they seem to play an important role.
Although lithium in pill form is a proven suicide
deterrent8, many at-risk patients
shun9 the drug due to side effects including hand
tremors10, thirst, and weight gain.
分享到：
Error Warning!
出错了
Error page: /mobile/index.php?aid=328817&mid=3
Error infos: Got error 28 from storage engine
Error sql: select `l`.`tag`,`l`.`index`,`l`.`level_id`,`b`.`id`,`b`.`word`,`b`.`spell`,`b`.`explain`,`b`.`sentence`,`b`.`src` from `new_wordtaglist` `l` left join `new_word_base` `b` on `l`.`tag`=`b`.`word` where `l`.`arc_id`='328817' and `l`.`level_id`>='' group by `b`.`word` order by `l`.`index` asc
