时间:2019-02-16 作者:英语课 分类:英语听力文摘 English Digest


英语课

Too Cold to Exercise?

天冷不宜锻炼?




D: Woo……It's freezing out.



Y: Come on, It's not that cold.



D: Sure it is. Yael.I guess there's just no way I can go jogging today.



Y: Oh, so that's what this all about.



D: Not really. What if my lungs freeze?



Y: Actually, your body is designed so that by the time air reaches your lungs, it’s been warmed up and moisturized by your nasal passages, throat, and trachea. Besides, the blood supply in your lungs is so well developed that there’s virtually no way they can freeze–the circulating blood keeps them nice and toasty.



D: Oh,yeah. So why does it hurt to breathe this really cold?



Y:Well,when the air is frigid 1, it doesn’t warm up sufficiently 2 before it reaches the airways leading to your lungs, and so it shocks the surrounding muscles and causes them to contract. This, in turn, causes your bronchial tubes to contract too, which results in that tight, prickly feeling.



D: Uh,sounds dangerous especially when you exercise in breathe to your mouth. What if my tongue freezes?



Y: Well,Don.Unless you suffer from asthma 3, breathing in cold air won’t hurt you–and you’d have to worry about frostbite to your fingers and toes long before worrying about your tongue freezing.











D:哇,外面太冷了。



Y:不会吧,没那么夸张。



D:确实很冷啊。我想今天也没办法跑步了。



Y:原来你是不想锻炼。



D:也不完全是。如果我的肺结冰了怎么办?



Y:实际上,我们的身体是有应对措施的。当空气进入肺部之前就已经被鼻腔,喉咙和气管加湿,加热。另外,肺部里的血液供给很充足,几乎没有可能结冰-——血液循环让肺部保持正常和舒适。



D:是吗?那为什么在呼吸冷空气时会疼痛?



Y:因为在寒冷的空气到达通向肺部的气管时还没有得到充分的热身,所以冲击到周围的肌肉使其收缩。转而使得支气管收缩,因此你就会有紧绷刺痛的感觉。



D:听起来很危险,特别是用嘴呼吸时,如果我的舌头结冰的怎么办?



Y:吸入的冷空气不会对你造成伤害,除非你患有哮喘。你应该担心手指和脚趾的冻疮而不是舌头结冰。

 



adj.寒冷的,凛冽的;冷淡的;拘禁的
  • The water was too frigid to allow him to remain submerged for long.水冰冷彻骨,他在下面呆不了太长时间。
  • She returned his smile with a frigid glance.对他的微笑她报以冷冷的一瞥。
adv.足够地,充分地
  • It turned out he had not insured the house sufficiently.原来他没有给房屋投足保险。
  • The new policy was sufficiently elastic to accommodate both views.新政策充分灵活地适用两种观点。
n.气喘病,哮喘病
  • I think he's having an asthma attack.我想他现在是哮喘病发作了。
  • Its presence in allergic asthma is well known.它在过敏性气喘中的存在是大家很熟悉的。
学英语单词
'nthe
Aesculus lantsangensis
agentships
ammoniabeam maser
anglifying
automatic door seal
baeri
better place
bexleyheath
bezzia nigriclava
bonus earned
carbonitriding salt
charcoal blast fuhmace
chewen
cold-drawing lubricant
colliquation
controllable load
coupler point curve
cytoprotective
Dendrobium fimbriatum
detachable panel
Dhahab, Wādī
dial speed meter
double finder telescope
electromagnetic minesweeping gear
energy-poor
enforcement bureau
expander
fadged
family dependents
feasible coordination
float mounting
foreign investments
identity unit
impeller-hub
instore-pack
inter-bank agreement
jerrilyn
long-term benefit
LTBMC
machine-imprinted
main droite
measuring bucket
microparasites
molten sample
Mount St. Helens
musicalizing
myocardial preservation
natroopal
neobornyral
noncontiguous linkage storage
partially refrigerated vessel
particulate radiation
passenger mentality
Paulinism
peak unit
pigment epithelial layer
polyembryonous
proprietary class
pure'e
purity check
quaternion hyperbolic space
re-elevated
real leather
reciever horn
rejected log
renanolone
ribbon reverse control
Saviotti's canals
set-stock grazing
Sicyos
silencer boiler
silkenly
sinus rhythm
spherical Bessel function
spinae palatinae
spinnacle
storest
Streptomyces hygroscopicus var. decoyicus
subnetted
subtrajectories
suitcasing
Synacthen
szucs
technical sequence for satellite test
temas
temporary partial disability
thyroglossal duct cyst
tood
top jar
top-spinning
Trailer Fee
tunable diode laser spectroscopy
Umbria
venire
Voykovs'kyy
Watuwila, Bukit
wave-path equation
wheezed
WiFi repeater
wishbone trysail
znik Gölü