时间:2019-03-06 作者:英语课 分类:英语时差8,16


英语课

 When you go to the pet store to pick out a new puppy, one of the first questions you may be asked is whether you want a male or a female. And when your friends have a new baby the first thing you find out is whether it’s a boy or a girl. We may be familiar with the physical differences between male and female in humans and other mammals, but outside of the mammals, the terms “male” and “female” take on some very different meanings. Aristotle defined females as those who could produce life inside themselves and males as those who could produce life in others. But the eggs of some animals, such as fish, are fertilized 1 after they are laid so that the embryos 2 develop outside of both parents. In other animals, such as earthworms, each individual has both male and female reproductive organs. Animals with both male and female organs are called “hermaphrodites.”



v.施肥( fertilize的过去式和过去分词 )
  • The study of psychology has recently been widely cross-fertilized by new discoveries in genetics. 心理学研究最近从遗传学的新发现中受益匪浅。
  • Flowers are often fertilized by bees as they gather nectar. 花常在蜜蜂采蜜时受粉。
n.晶胚;胚,胚胎( embryo的名词复数 )
  • Somatic cells of angiosperms enter a regenerative phase and behave like embryos. 被子植物体细胞进入一个生殖阶段,而且其行为象胚。 来自辞典例句
  • Evolution can explain why human embryos look like gilled fishes. 进化论能够解释为什么人类的胚胎看起来象除去了内脏的鱼一样。 来自辞典例句
学英语单词
abylid
accept stock
antiandrogen
appendicoliths
aprophene
Arandis
arctation
assimilation
battery ore
bipolar semiconductor
blinking characteristic
blue dun
bull barn
cartomancies
cassette video tape
corrosive wear
course recorder
cyanamide (nh3cn)
dimethyl-guanidine
direct-current potential transf-ormer
Doradidae
effective degree of freedom
epicheirema
epitheliotoxin
erinicine
fawn foot
firing data computer
fitting data
floor paved with thin plastic plate
foot fastener belt
fore-loader
freedwoman
Gaucher's cells
gave brain
get in sb's hair
gherardini
glass colth laminate
go-teams
grade limit
HARINGEY
hierarchical indexed sequential access method
highly-enriched
humping section
I cell
infantry weapon
Internet slang
interstellar lines
isographic
Jesewitz
jostler
l.f
laboratory sole
lbo
logic in ancient China
magnetometric resistivity method
medial cartilaginous lamina
mercurobutol
methylalloxan
Mogoll
monolepta longitarsoides
montanic
neptamustine
netgrocer
new criticisms
non-silting channel
nonimperial
optimization of invariant operations
orbit calculation
parental ditype,PD
perpetual strawberry
PGD (pulse generator display)
pipunculus (eudorylas) separatus
pre-stopped
pressed metal section
Puurs
rabbitry
radioactive law
razordisk
sciapus matatus
search radar aircraft
secondary modern schools
Shatnerizations
shutoff sequence
single sweep
Socho
spring leaf retainer
Tarim He
technological equipment
the cream of sth
the past
thermodesorption
thread rolling head
tin(iv) phosphorus chloride
top-root ratio
transitional cells
trimmer arches
unprepossessed
varted
vena testicularis
virtual address
vycol (glass)
yarmuks