时间:2019-02-08 作者:英语课 分类:Facts-事实


英语课

 Pre-Listening Vocabulary


 
observation: something that you see
cross section: a view of the inside of something after a cut has been made across it
hold true: remain a fact or truth even in other situations
ideal: suitable
sap: fluid (sugar and minerals) inside a plant
resistant 1: able to withstand
 

Da Vinci’s Rule of the Trees
Over 500 years ago, Leonardo da Vinci made an interesting observation about trees. He concluded that the total thickness of a tree’s branches at a certain height almost always equals the total thickness of the tree trunk. In other words, as the tree splits into branches, the cross section of the branches remains 2 equal to the cross section of the trunk. This observation holds true for almost all trees. When trees begin to split, they make exact copies of themselves. Scientists believe that there are two reasons for this law of nature. Firstly, this design is ideal for transporting sap through a tree. Secondly 3, this structure makes a tree more resistant to wind. Artists commonly use Leonardo da Vinci’s rule of nature to design real-looking trees.


adj.(to)抵抗的,有抵抗力的
  • Many pests are resistant to the insecticide.许多害虫对这种杀虫剂有抵抗力。
  • They imposed their government by force on the resistant population.他们以武力把自己的统治强加在持反抗态度的人民头上。
n.剩余物,残留物;遗体,遗迹
  • He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
  • The remains of the meal were fed to the dog.残羹剩饭喂狗了。
adv.第二,其次
  • Secondly,use your own head and present your point of view.第二,动脑筋提出自己的见解。
  • Secondly it is necessary to define the applied load.其次,需要确定所作用的载荷。
学英语单词
all-overish
aluminum gallium nitride
analogue amplifier
anorethisterone
back steam chest head
begilded
benzoylglucuronic acid
Berytidae
biophysics of cardiac muscle
birthweights
Bosanski Petrovac
buffer species
bull-leaping
C- section
car load freight unloaded at two or more stations
channel electron multiplier
cheeseparer
Chromobacterium indicum
Conline Bill
continuous adjustment
corkscrewy
cost-reduction
cut them out
cybertechnologies
cypselurus unicolor
dementie
derecognizing
doulateral winding
Edane
effective cross section
Emin He (Emel')
endowment mortage
engineering advice
failure rate average function
faying face
frederick church
Galician-Asturian
gene arrangement
Genoa, Gulf of
Goniatidae
goods insurance
grimboes
hard magnetic ferrite
high-angle shot
hinged bearing
human factors engineering (hfe)
Humboldt penguins
intercalation coordination compound
its feet
kobielak
labefactation
laser homing equipment
lasithi
legal cause
life-expectancy
made short work of
make up deficit
massed trials
mons veneriss
moon's age
multistory sand body
nestantalite
non-perfect fluid
nuclear generator
number of blows
ordering of events
oxygenation
Pentadecanone-2
phyllocarpic movement
pompelmouses
postfrontal fog
preferred estimator
presplits
prevailing mode
protecting rack
quaid-i-azam
ramalina hossei
random access number out-of-range
residual shim
ringbang
royale
rubellite
sagittifolium
shear slide
Shekhina
shell landings
social welfare expenditure
Soumoulou
speedometer needle
subscriber telephone set
swanees
sweep before one's own door
tangent length
tetrahydrofurfuryl benzoate
time of mixing
toggle link
treelings
uk pharmaceuticals
unmanned sensing satellite system
verticalizing
vichyites
viewing room