时间:2019-03-06 作者:英语课 分类:英语时差8,16


英语课

 Sometimes it’s easy to understand how an evolutionary 1 change took place, but it’s more difficult to understand why. For example, consider the beautiful birds of paradise which live in the forests of New Guinea. The males of many bird-of-paradise species have evolved colorful plumage, used for dramatic courtship displays. How this plumage evolved is no mystery: The healthiest males usually have the most spectacular plumage, so females choose whichever male has the gaudiest 2 feathers. With this criterion, it’s not surprising that male plumage would grow more and more elaborate over the generations. Understanding WHY the plumage evolved is a little trickier 3. After all, there are some bird-of-paradise species that are really quite drab. These birds devote most of their energy to finding food and raising their young, instead of wasting it on courtship. What makes these near neighbors so different?



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。
adj.花哨的,俗气的( gaudy的最高级 )
  • The witch doctors were bedizened in all their gaudiest costumes. 女巫医穿上她们最绚丽的衣服,打扮得俗不可耐。 来自辞典例句
adj.狡猾的( tricky的比较级 );(形势、工作等)复杂的;机警的;微妙的
  • This is the general rule, but some cases are trickier than others. 以上是一般规则,但某些案例会比别的案例更为棘手。 来自互联网
  • The lower the numbers go, the trickier the problems get. 武器的数量越低,问题就越复杂。 来自互联网
学英语单词
admiral
air conveying
Amanita verna
american geophysical union (agu)
angle of flare
Anould
antihaemophilic factors
atsuda
azaspiracids
Babinski's test
bet one's bottom dollar
Bletchley
bridge weld seam
bridge wing console
buyer's agent
calange
calathian violets
cancerometastasis
club fungi
comminution
common cold virus
contours
deluxe binding
diplomatic immunities
dizygote
DlX, Dorothy
DMPO
drawn by
echter
enamelist
exults
flagged
fruitious
gedankenexperiments
genital orifice
get into trouble with
growth rhythm
Haksǒngsan
homo-orientin
HSAC (high speed analog computer)
hygrom of cavum retzii
immersion of thermometer
inner radiation belt
Instant Karma
internal upset tubing
International Tanker Owner's Association
interstitial compounds
lampooner
logicisms
longday plant
low frequency modulation
Marshall-Palmer distribution
matrix algebras
methyl cycloheptanol
midflow
ochrobirine
oculistic
oligoubiquitins
PA-LS-ID
PAL system
peracchi
pertaineth
phosphorize
phyllachora schimae
positive income effect
preachily
premonitive
product development management
Ras al Khaimah
reference accelerometer
relict natural community
revenewe
Rick Santorum
road sprinkler
rotary piston motor
rotating mirror
Ruandan
schoolgrounds
schorls
sealanes
shop bell
silo depth
snow break wall
solar cell short circuit current
source drive
spin-precession
static exciter
straughted
table specification data
Takeovers Appeal Committee
tiger-proof
transportest
trieues
truanted
undereaters
urodelans
vapour pressure of solution
water-cooled footstep
wave the bloody shirt
weft fork motion
worra
would not