不等比例分层抽样

Surprising Origin of 'To Keep at Bay' Now, it's time for Words and Their Stories from VOA Learning English. On this program, we explore everyday expressions that we use in conversation. Americans often use the first saying we will talk about today. B

发表于:2018-12-07 / 阅读(53) / 评论(0) 分类 2017年VOA慢速英语(七)月

What do you do when you have time to kill? It's a bit of a violent phrase, isn't it? It really means to use up spare time, or extra time. That is just(1) what I was doing this weekend, while I was waiting for my son's basketball game to start. We had

发表于:2019-01-01 / 阅读(44) / 评论(0) 分类 英语博客 A cup of English

In Part 1 of this program, we told you many uses of would in everyday speech. Today, we will talk about two more uses. Well also look at some important elements for understanding this modal verb. Before we continue, though, lets do a short review exe

发表于:2019-01-03 / 阅读(58) / 评论(0) 分类 2018年VOA慢速英语(七)月

Johannesburg Leads Africa in Twitter Usage 推特使用方面南非冠绝非洲 From VOA Learning English, this is the Tech Report. 这里是美国之音慢速英语科技报道。 Johannesburg is tweeting up a storm. The South African city leads the

发表于:2019-01-12 / 阅读(50) / 评论(0) 分类 2014年VOA慢速英语(四)月

Dictionaries range broadly in purpose, size, and price; and choosing one is a very personal decision. The best advice is to make note of the things you and your family look up in a dictionary over a few weeks' time, and then go to a comprehensive boo

发表于:2019-01-25 / 阅读(50) / 评论(0) 分类 实用英语

How to Use the Word 'Ever' Have you ever noticed the number of times that a native English speaker uses the word ever? Ever is an adverb that we Americans say a lot. Heres todays question, from Zanoni in Venezuela: Question: Hello. I would like to ge

发表于:2019-02-14 / 阅读(58) / 评论(0) 分类 2019年VOA慢速英语(一)月
学英语单词
.ppm
a. lumbalis ima
Abri Audit
Aouk-Aoukalé, Réserve de Faune de l'
atrioventricular(AV)block
automatic calcuating and writing equipment
automatic decision making
axial plane component of velocity
belly of muscle
benzene monocarbonic acid
book coupon
borodaevite
Bourbre
Bureau International de l'Heure
calothyriopeltis scolopiae
Caryota ochlandra
coal bunkers
collision warning
commercial counsellor
correspondense principle
curl your lip
cylinder-barrel
cyperus malaccensis monophyllus
deliquescences
dig and delve
dihydroxypropane
direct memory execute
disvoice
dynamic collapse
electric shave mirror
electric-motorcar
elephantiasis of penis
ethyl hydroselenide
excitation spectra
exploratory reflex
famel
feeder drop
fused salt extraction
glass sealing alloy
gonnardite
habiline
half-down
historiette
hydrobromic
inductive winding
infilmed
intertype competition
iris-coupled wavemeter
Jeroboams
jumped in
Jurisdiction on Carriage of Goods by Rail
kalvin
knock-on certainty
knothole mixer
life in being
lift-off mass
live-blogging
looper shaft
Marsipobranchii
Matzbach
Mercury-203
monochrome adapter
Mount Wolf
multiple disk clutch
nonstranger
outage repair
outpress
package pin limitation
Parafusulina
plain swamp
polarogra
pore water pressure coefficien
porter house
preselected scrap
project-baseds
puandtl-gauret rule
purl edge
Raman frequency
reepithelialisation
repair shop
rotary squeeze pump
single payment personal cash loan
sinusoidal signal generator
special-shaped parts
spurwing
stanine
structural dynamic analysis
substitution in production
subtask
Tahuian
tea tree oil
Tehrān, Ostān-e
textual criticisms
the last person
UICIO
ungeometrical
untieing
water tight generator
weatherizes
wind gauges
window options
wrist supporter