音标:[ˈpɔzitiv ˌri:inˈfɔ:sə] ;
正强化物
词型变化:名词复数形式 : positive reinforcers

[00:02.48]Extract 1 Listen and repeat. [00:08.14] - watch job [00:14.26] - act man [00:18.97] - father car [00:23.98] - call morning [00:29.48]Extract 1 Note the order in which you hear the contracted verb forms. [00:40.43]they'll [00:43.49]I'll [00:

发表于:2018-12-04 / 阅读(51) / 评论(0) 分类 电视大学开放英语

Xiaohua is 12 and lives in a province in South China. She is a happy girl who smiles a lot and likes to talk to her friends after school. People who see Xiaohua would never guess that she is one of millions of children in the world living and dying

发表于:2018-12-29 / 阅读(34) / 评论(0) 分类 人教高中英语高二

For VOA Learning English, this is Everyday Grammar. Today we have a special guest host. Betty Azar is the most successful writer of grammar textbooks in the world. Generations of English learners will recognize her best-selling book Understanding and

发表于:2019-01-03 / 阅读(49) / 评论(0) 分类 2018年VOA慢速英语(九)月

Everyday Grammar: The Sounds of Grammar with Betty Azar Today we have a special guest host. Betty Azar is the most successful writer of grammar textbooks in the world. Generations of English learners will recognize her best-selling book Understanding

发表于:2019-01-12 / 阅读(59) / 评论(0) 分类 2015年VOA慢速英语(八)月

New reports show that manufacturing slowed across much of the globe in August, fueling new fears of a worldwide economic downturn. One survey Thursday showed that manufacturing in the United States, the world's biggest economy, advanced slightly last

发表于:2019-01-16 / 阅读(103) / 评论(0) 分类 英语新闻

A teacher asked one of her pupils, What'sthe nation's capital?The reply was, Washington DCOn being asked what the DC stood for,the pupil added, Dot com!

发表于:2019-02-09 / 阅读(56) / 评论(0) 分类 趣味英语
学英语单词
active hypopus
ad hoc method
AKEY
Alni alloyed nickel steel
amphibaric
animal adhesive
annualization of expense
anthaxia erato
assembled unit
autostereograms
axis oculi interna
Balmoralities
bank reserve requirment
bathyconductorgrahp
be a monkey on one's back
biological benchmark
blasting protection facilities
blepharosynechia
bull-nose stretcher
bully net
burlesquer
Carbazilquinone
cash day book
chalaronne (la chalaronne riviere)
christophenes
chromatic alteration
combative contest
comminatory
continuous flow production process
corrective moment
curtseying
Desopimon
e-archive
electronical time relay
emergency steering gear
esprit
expressive order
face lapping mill
false cognate
family Cetorhinidae
fibinopeptide
fighter cover
finishing materials
focus modulation
full lift valve
gas phase saturation
ginger blotch
granuloviruses
GVIF
handbagging
Hemsloh
high-explosive antitank
honeycomb core sandwich composite
intravitally
inversion of control
kayaflavone
Ku-Klux
Laguna Yema
lakisha
lateral callis
liver glycogen
lyagin
Math 2-plus
mitte-seite stereo system
nervi splanchnici pelvini
non-selective absorbent
oil-hungry
orthotopic liver transplantation
P Series
palaeopropithecids
picture-dot interlacing
pilly
pitrilysins
polymicrobial
primary triangulation
program-controlled milling machine
pulicarias
queer anarchism
rausa
Reinstorf
renumbered
reoxygenating
reviewers
rich-poor
saintuaire
schmallenberg virus
sea water molecular physics
Sencephalin
send down the throat
shahroudi
snatch-block
Somerville and Ross
step power change
Strobilanthes rankanensis
surface-set bit
total openflow area
true ankylosis
Virginiatown
wakeners
Wallgau
wire-controlled antitank rocket