时间:2019-01-26 作者:英语课 分类:英语听力文摘 English Digest


英语课

  Under normal circumstances, each of your brain cells allows various substances, such as sodium 1, calcium 2 and potassium to permeate 3 its outer cell membrane 4.

Once inside the brain cell, these substances help give the cell stimulus 5 it needs to function properly. Then they leave the cell and allow another set of these substances to begin the cycle again.

The millions of cells that make up your brain are continually allowing these substances to penetrate 6 their membranes 7 and then expelling these same substances later. All of this action allows the brain to interpret and transport messages.

Alcohol consumption prevents sodium from being able to cross brain cell membranes. Once even this part of the cycle breaks down, brain functions become impaired 8.

You can notice the affects of this break down after a single drink. Even if you’ve had just one drink, your ability to respond to stimulus decreases and your reaction time slows down.

If you’re driving, you might see a car stop, and know that you need to slam on the brakes, but the pathway in your brain that processes this information and causes you to respond to it will be working in slow motion.

sodium:钠

calcium:钙

potassium:钾

cell membrane:细胞膜

slam:猛烈抨击;使劲一推



n.(化)钠
  • Out over the town the sodium lights were lit.在外面,全城的钠光灯都亮了。
  • Common salt is a compound of sodium and chlorine.食盐是钠和氯的复合物。
n.钙(化学符号Ca)
  • We need calcium to make bones.我们需要钙来壮骨。
  • Calcium is found most abundantly in milk.奶含钙最丰富。
v.弥漫,遍布,散布;渗入,渗透
  • Water will easily permeate a cotton dress.水很容易渗透棉布衣服。
  • After a while it begins to permeate through your skin.过了一会,它会开始渗入你的皮肤。
n.薄膜,膜皮,羊皮纸
  • A vibrating membrane in the ear helps to convey sounds to the brain.耳膜的振动帮助声音传送到大脑。
  • A plastic membrane serves as selective diffusion barrier.一层塑料薄膜起着选择性渗透屏障的作用。
n.刺激,刺激物,促进因素,引起兴奋的事物
  • 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。
v.透(渗)入;刺入,刺穿;洞察,了解
  • Western ideas penetrate slowly through the East.西方观念逐渐传入东方。
  • The sunshine could not penetrate where the trees were thickest.阳光不能透入树木最浓密的地方。
n.(动物或植物体内的)薄膜( membrane的名词复数 );隔膜;(可起防水、防风等作用的)膜状物
  • The waste material is placed in cells with permeable membranes. 废液置于有渗透膜的槽中。 来自辞典例句
  • The sarcoplasmic reticulum is a system of intracellular membranes. 肌浆网属于细胞内膜系统。 来自辞典例句
adj.受损的;出毛病的;有(身体或智力)缺陷的v.损害,削弱( impair的过去式和过去分词 )
  • Much reading has impaired his vision. 大量读书损害了他的视力。 来自《现代汉英综合大词典》
  • His hearing is somewhat impaired. 他的听觉已受到一定程度的损害。 来自《现代汉英综合大词典》
学英语单词
all-court game
Angevin empire
Anthochroite
asahinea chrysantha
axe wound
axial freedom
belittlements
biogenetic stimulation
biometric sample
bisexualness
boned
caruncul? hymenales
Cb.cal.
chaabi
change of ownership
chemoinduction
chiarelli
chickas
colloquial speech
cranial mammary gland vein
crast
crosstalk unit
dial indicator (gage)
eggshakes
elemental time
enclosed nonventilated motor
endogenous antidiuretic hormone
extremely coarsely crystalline
factas
felt damp-proof course
financial class
first-raters
flexible linear macromolecule
forearcs
Gentiana prostrata
goods liable to excise
gudgeon pin cover
Gymnostachyum
have a shot at
headless system
helitack crew
herwalds
horsenettle
invasive mole of parametrium
ionization vacuum ga(u)ge
isoclined
ivarsson
lamb's-wool
land base
land-metster
Lawson-eve
LICROSS
magnetic traveling crane
measurement basis
metastatic carcinoma of mediastinal lymph node
mikania scandenss
moisture permeability
moon buggy
muck-a-muck
multituyere distributor
Nhandeara
normal profit rate
number of outpatients
Ohrum
old wine in new bottles
oncorhynchus formosanus
oscillatoria
Peyrusse-Grande
physostab
plant viruses
pollux
porres
Prirechnyy
Randowaya
resistance type furnace
right of special permission
rux
scarrow
selected class
senior chief petty officer
Sevan trout
small scale air separation plant
snoopee
solvent segregation
speculatively
statistical uncertainty
structure of accounts
stuporous alienation
syntax statement
taraxacum officinales
taxable income brackets
technikmuseum
thermal halo
triple-bogeys
tyrosyl-glycine
Ubaidians
untapt
Voka
weight-trainings
WHMIS
zakanitch