时间:2019-01-10 作者:英语课 分类:与美国小学生一起学英文第12册


英语课

   Osmosis 渗透作用


  When you water plants or flowers, do you pour water on their leaves? 你给植物或花浇水时,会把水倒在它们的叶子上吗?
  No, you don't. You may pour water on the ground. 不,你不会。你可能把水倒在地上
  Then the plants and flowers absorb water through their roots. 然后植物和花从根部吸收水分。
  How can they do so? 它们怎么办到的呢》
  It is because they can perform osmosis. 这是因为它们可以进行渗透作用。
  Osmosis is the phenomenon of water flow. 渗透作用是水流动的现象。
  The roots of plants work as a filter. 植物的根是一个过滤器。
  They prohibit the nutrients 1 in the roots from going out of the plants, but let the water in the plants. 它们禁止根部的营养成分流出去,但又让水分进来。
  Plants usually have big and long roots, because they want to absorb more water from the ground. 植物的根通常大而长,因为它们想从地面吸收更多的水分。

n.(食品或化学品)营养物,营养品( nutrient的名词复数 )
  • a lack of essential nutrients 基本营养的缺乏
  • Nutrients are absorbed into the bloodstream. 营养素被吸收进血液。 来自《简明英汉词典》
标签: 小学英语
学英语单词
acid proteases
aerial cable line
air handling equipment
ambient-temperature compensation
assenter
autoinhibiting
automatic chute
beat sb hollow
boron p-tolyl difluoride
buttterworthing
calson
canacids
capsuler
carrier suppression system
cast urea-formaldehyde plastic
cattaro (kotor)
celadon with brown mottles
ckii
classlessly
conical net
conjugate depth
consolidated slow test
constant-volume thermometer
currentest
determination of patentability
digital data transmission system
directrix of conic
El Jadida, Wilaya
El Saucejo
electro-therapeutic display of blunt needle
eohippus
Ethatab
flappier
free from disease
fruit gardening
fuel mineral
geometric solution
glacier buttercup
Glycerol-1-phosphatase
goksel
governance
Green Line
Haemopis sanguisuga
half-tone information
Hardyan
hay varieties
hip-cat
Homochloreyclizine
intensity of wave pressure
interpretatio
knowledge engineer
Languas speciosa
leave function
lightbox
loading berm
magazine tool holder
main reasons
Make directory
Mary Of Orange
masked off
moment of precession
oil proof test
oneironaut
oversend
painted frog
Pardew
pass fish eyes for pearls
Peflate
physical system time
PID tuning
production control function
Prosiphneus
Putyatina, Ostrov
Pyrogelite
raisin pudding
reche
recovery characteristic
Robinson's disease
RQLIQ
Ruoti
scale error card
scavia
second-hand witness
semicarbazide hydrochloride
small hole electrospark grinding
static classes
statistiquement
stirrest
Styphnolobium japonicum
sulphide barrier
synchondroses petrooccipitalis
Temangan
threepeated
tittler
unemploy
velocity-focussing mass-spectrograph
virtual pair
visualisings
wide-angle photograph
zipless