英语 英语 日语 日语 韩语 韩语 法语 法语 德语 德语 西班牙语 西班牙语 意大利语 意大利语 阿拉伯语 阿拉伯语 葡萄牙语 葡萄牙语 越南语 越南语 俄语 俄语 芬兰语 芬兰语 泰语 泰语 泰语 丹麦语 泰语 对外汉语

【英语时差8,16】痒痒

时间:2015-10-28 05:56来源:互联网 提供网友:yajing   字体: [ ]
特别声明:本栏目内容均从网络收集或者网友提供,供仅参考试用,我们无法保证内容完整和正确。如果资料损害了您的权益,请与站长联系,我们将及时删除并致以歉意。
    (单词翻译:双击或拖选)

 When you have an itch1, you scratch it. What could be more simple than that?   Scratching itches2 is one of our most basic instincts, one which we share with many other animals. Have you ever stopped to wonder, mid-scratch, exactly why scratching is so effective against itching3? We'll learn the itchy truth, on today's Moment of Science.

On the most basic level, scratching is a way to remove whatever irritant might be causing the itch in the first place. If an insect is biting you, or you have a patch of dead, flaking4 skin, scratching has a good chance of getting rid of it. In this case, it's pretty obvious why the scratching works.
Much of the time we scratch, however, it seems to be somewhat after the fact. Perhaps the mosquito has already bitten us and flown away, and we are left scratching at the swelling5 bite. Clearly this won't get rid of the mosquito. Is there any good reason for this kind of scratching, or is this just an over-zealous instinct that doesn't realize it's too late?
Actually, this kind of scratching can serve two additional functions. First, it can stimulate6 the irritated tissues and cause extra blood to flow to them. This can help your immune system remove whatever itchy substances might be below your skin. Second, it can trick your brain into ignoring the annoying itch. Your nervous system can generally process only one stimulus7 from a given area of your skin at a time. If you scratch at an area that itches, this new, greater stimulus can override8 the itching, effectively blocking it out. 

点击收听单词发音收听单词发音  

1 itch 9aczc     
n.痒,渴望,疥癣;vi.发痒,渴望
参考例句:
  • Shylock has an itch for money.夏洛克渴望发财。
  • He had an itch on his back.他背部发痒。
2 itches dc432e5af5297d5b31631e178674d785     
n.痒( itch的名词复数 );渴望,热望v.发痒( itch的第三人称单数 )
参考例句:
  • His wool shirt always itches him. 他的羊毛内衣总是使他发痒。 来自《现代汉英综合大词典》
  • This wool shirt itches my back. 这件羊毛衫使我背上发痒。 来自《现代英汉综合大词典》
3 itching wqnzVZ     
adj.贪得的,痒的,渴望的v.发痒( itch的现在分词 )
参考例句:
  • The itching was almost more than he could stand. 他痒得几乎忍不住了。 来自《现代汉英综合大词典》
  • My nose is itching. 我的鼻子发痒。 来自《简明英汉词典》
4 flaking a682d1b1030727ea5bda416e41040cba     
刨成片,压成片; 盘网
参考例句:
  • He received ointment for his flaking skin. 医生给他开了治疗脱皮的软膏。
  • The paint was flaking off the walls. 油漆从墙上剥落下来。
5 swelling OUzzd     
n.肿胀
参考例句:
  • Use ice to reduce the swelling. 用冰敷消肿。
  • There is a marked swelling of the lymph nodes. 淋巴结处有明显的肿块。
6 stimulate wuSwL     
vt.刺激,使兴奋;激励,使…振奋
参考例句:
  • Your encouragement will stimulate me to further efforts.你的鼓励会激发我进一步努力。
  • Success will stimulate the people for fresh efforts.成功能鼓舞人们去作新的努力。
7 stimulus 3huyO     
n.刺激,刺激物,促进因素,引起兴奋的事物
参考例句:
  • Regard each failure as a stimulus to further efforts.把每次失利看成对进一步努力的激励。
  • Light is a stimulus to growth in plants.光是促进植物生长的一个因素。
8 override sK4xu     
vt.不顾,不理睬,否决;压倒,优先于
参考例句:
  • The welfare of a child should always override the wishes of its parents.孩子的幸福安康应该永远比父母的愿望来得更重要。
  • I'm applying in advance for the authority to override him.我提前申请当局对他进行否决。
本文本内容来源于互联网抓取和网友提交,仅供参考,部分栏目没有内容,如果您有更合适的内容,欢迎点击提交分享给大家。
------分隔线----------------------------
顶一下
(0)
0%
踩一下
(0)
0%
最新评论 查看所有评论
发表评论 查看所有评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:
听力搜索
推荐频道
论坛新贴