时间:2019-02-15 作者:英语课 分类:英语时差8,16


英语课

Today’s word is: osteoporosis! Yep, osteoporosis. Now, you’ve heard this word before, and you know it has something to do with bones. But can you actually explain what it is? The answer is straight-forward. It comes down to the fact that we human beings need calcium 1 in our blood–it allows us to do all sorts of neat things, from contracting muscles to conducting nerve impulses. Where to get some calcium? Food is a good idea. But what if there isn’t always calcium-rich food to be had, as was probably the case for most of our long evolutionary 2 history? Best to store some for a rainy day. Store it where? The skeleton works! Then, when the blood runs low on calcium, a signaling device called the parathyroid gland 3 can activate 4 a process by which calcium is taken from the skeleton and put back into the blood.



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。
adj.进化的;演化的,演变的;[生]进化论的
  • Life has its own evolutionary process.生命有其自身的进化过程。
  • These are fascinating questions to be resolved by the evolutionary studies of plants.这些十分吸引人的问题将在研究植物进化过程中得以解决。
n.腺体,(机)密封压盖,填料盖
  • This is a snake's poison gland.这就是蛇的毒腺。
  • Her mother has an underactive adrenal gland.她的母亲肾上腺机能不全。
vt.使活动起来,使开始起作用
  • We must activate the youth to study.我们要激励青年去学习。
  • These push buttons can activate the elevator.这些按钮能启动电梯。
学英语单词
absolute sale level
actualizing tendency
affectional film
all-the-time
altitude data unit
appropriation of surpluslabor
auricular fistulae
Black Notley
bloodsugar
bolleyball
bona vacantia
by-pass capacitor
cash outflows
change-rounds
cholecystectomies
clindamycin-induced colitis
CloneAmp system
coacervates
coastal delta
computer-assisted statistics
cone of support
coxopleural
crystalline granule
D.P.H.
dassaults
dc equivalent circuit
depth of breaking
dichlorodibromomethane
digitary
distearyl thiodipropionate
ear drop
economic network equilibrium
elamp
estrategia
experimental class
explosion-proof electric actuator
feed gear
fenno
fixed routing
flexiplastics
folliculitides
gas cartridge
gas tempering
Gibbs-Konovalow's rule
government employees
green star-signal
haphazardnesses
head oil
homopolymerizes
hoverpallet
hydrophiid
IEAK
image manipulation
in drops
insatiable hunger
interchangeable parts
island-building
kept himself to
law of development
low viscosity
lynxlike
MacDougal's theory
mocklers
Naenae
Nance, R.
nonherbivore
oil-immersed air-blast cooling
once-staid
pairwise orthogomal
percalines
polyacetaldehyde
postulated accident condition
properidine
rangatiras
rayleigh disks
reuss and voigt bounds
rhesus macaques
seccoes
shock absorber ball stud
short-period circuit
sleighbell
slimely
sour dry gas
source plasma
spermiogeneses
Spirillum violaceum
sport team
stomatic
super cavitation propeller
sympatho-
synagogue-going
tag sales
tediferous
ternarily
torque wrenches
transaction or occurrence
triode smplifier
urbanized village
useableness
vasulitis
woodworking hand chisel
yellow room