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
administracin
agtgravation
apac
arbor with cross-key
asbest cord
attometer
azara
banqueted
bexide
binding energy per particle
bitemporal hemianopsia
blending process
calyon
carcholin
carmegliptin
carter's spread
Chestertonians
chord inclination
clickily
Constantine Bay
culvert end lift
cut-away cassette
cytogeneticists
desiccants
diglycin
dollkind
donor doping
dragance
drill pipe flexweight
early response
edge effect of laminate
enforce the law strictly
field working
fixed dressing
flamingo-flower
flank forward
Fonofos
go into detail(s)
guaranteed-efficiency
hand operated direction valve
high level control
ileocolic veins
intercontinent
internal orifice of aqueduct of vestibule
Jew's-trumps
levirate
light intemsity variation
low temperature specific heat
lsb
Luqa Internat.Airport
magnesyn compass
maianthemum formosanum
malformation of heart
mat-backed film
monoid curve
montezs
multi-valued decision
network status
off - shore wind
official life
oil holder
olby
Ontariolite
optional half instruction
output voltage swing
parkwest
percentage of diminishing value plan
permeation flux
pipeworkers
protestantizations
pupa coarctata
radio radiations
Ranunculus muricatus
rashly launching new projects
reaggregated
right of rescission
saint-jure
sardonic smile
sash bracket
schaaf
semi-automatic telephone switch board
silurus glaniss
starter button
sticking places
sugar lumps
synaptoneurosomes
taper rolling
tetradentate
thermal equivalent
to much purpose
top-off
total thickness
track control arm
transcriptomic
turks head roll
Universal Telecommunication Radio Access Network
user's needs
vocal coach
warbags
what's with
yarrans