[机] 蛋白质序列系统发生

Editors note: This is the third episode of four-part series on verb tenses. Be sure to listen to part one and part two first. For VOA Learning English, this is Everyday Grammar. Today we are going to talk about the perfect verb tenses. Perfect tenses

发表于:2018-11-27 / 阅读(422) / 评论(0) 分类 2016年VOA慢速英语(十二)月

Section A [00:01.23]1. M: I haven't decided which subject to major in [00:04.96]physics or chemistry. [00:07.76]W: It isn't easy to choose,is it? [00:10.21]Q: What does the woman mean? [00:13.87]2. W: The map shows that this street goes downtown. [00

发表于:2018-11-29 / 阅读(201) / 评论(0) 分类 决胜四级听力必备

Section A [00:01.54]1. M: My grandpa died in 1978. I was 18 years then. [00:08.20]W: That means he would be 76 if he were alive. [00:11.49]Q: How old was his grandpa when he was dead? [00:14.45]2. M: Why are you going so fast? [00:17.53]Where are you

发表于:2018-12-01 / 阅读(249) / 评论(0) 分类 决胜六级英语听力

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Its the time of year to take a look backand thats just what the journal Science did as they listed their most important breakthroughs of 2008. At the v

发表于:2018-12-02 / 阅读(146) / 评论(0) 分类 Scientific American(十二)月

图片 by Jason Marshall Its not often someone suggests that knowing some math could make you the life of the party, but thats exactly what Im going to do. Yes, a properly timed delivery of a few fun facts about the famed Fibonacci sequence just migh

发表于:2018-12-07 / 阅读(147) / 评论(0) 分类 数学英语

[ti:UNIT 7 Enjoy Your Hobby Lesson 56:Unit Review] [0:01.051]Unit 7 [0:02.631]Enjoy Your Hobby [0:04.894]Lesson 56: [0:06.943]Unit Review [0:08.907]I. [0:10.231]Building Your Vocabulary [0:12.963]A. [0:14.500]Fill in each blank with the proper word o

发表于:2018-12-10 / 阅读(155) / 评论(0) 分类 河北教育初中英语(初中起点)八年级上

发表于:2018-12-12 / 阅读(85) / 评论(0) 分类 医务英语

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The human genome was sequenced, and in the process of moving that forward the technology that was developed was incredible. And because of their efforts in human genome,

发表于:2018-12-24 / 阅读(193) / 评论(0) 分类 Scientific American(十)月

Describing Order and Sequence Patrick: Okay, your first task is to put all of these files in order. Maya: Wow, there must be hundreds of files in this storeroom. How am I supposed to organize them? Patrick: Create a basic filing system. Put things in

发表于:2018-12-27 / 阅读(139) / 评论(0) 分类 2014年ESL之商务英语

图片 by Jason Marshall Some math is functional. Some math is fun. And some math is simply stunning. If that last description sounds improbable to you, then today just might change your mind. Because now that weve covered enough ground, were going t

发表于:2019-01-02 / 阅读(231) / 评论(0) 分类 数学英语

This is Scientific American's 60-Second Science. I'm Steve Mirsky, got a minute? Neandertals were our closest relatives. And now we know a lot more about them. Because researchers have for the first time sequenced a complete Neandertal genomethat of

发表于:2019-01-08 / 阅读(159) / 评论(0) 分类 Scientific American(八)月

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? Robin Williams thought that the platypus was cobbled together by an inebriated deity: Lets take a beaver. Lets put on a ducks bill. Now we know how weird the platypus is

发表于:2019-01-08 / 阅读(151) / 评论(0) 分类 Scientific American(五)月

a butterfly with glowing eyes Believe it or not, Monteiro and her team insert ed a new gene into the butterflys genetic sequenceone taken from a jellyfish . No, I know you're fooling. Actually I'm not. This gene codes for a green florescent protein t

发表于:2019-01-26 / 阅读(87) / 评论(0) 分类 英语听力文摘 English Digest

SCIENCE REPORT – January 23, 2002: Aging Protein By Jerilyn Watson This is the VOA Special English Science Report. A new study suggests that a protein that protects animals from cancer early in life

发表于:2019-01-30 / 阅读(172) / 评论(0) 分类 科技之光

Low-salt,low-protein diet can prevent kidney stonesA diet low in salt and meat can dramatically reduce the risk of kidney stones,according to an Italian study that could spell the end for the low-calcium diet that doctors have been recommen

发表于:2019-01-31 / 阅读(141) / 评论(0) 分类 阅读空间

古埃及金字塔是奴隶制帝王的陵墓,最宏大的当为吉萨三座大金字塔。塔基呈方形,每边长230米,高146米,用230余万块巨石(每块平均重达2.5吨)垒成,国王墓室用一块400吨重的石板垒成。整体规

发表于:2019-02-01 / 阅读(115) / 评论(0) 分类 阅读空间

BEIJING, Aug. 22 (Xinhuanet) -- Researchers have discovered how a human egg captures an incoming sperm for fertilization, paving the way to help couples suffering from infertility, according to media reports on Monday. An international team of resear

发表于:2019-02-08 / 阅读(162) / 评论(0) 分类 英语新闻

Listen to the schedule of a business trip. Fill in numbers l-8 to point out the sequence of the schedule. I'm leaving for Milan on the 7th of June. l'II arrive there on the 8th evening at about 7:OOpm. Then, l'II take a shuttle bus to the hotel. On t

发表于:2019-02-17 / 阅读(126) / 评论(0) 分类 英语听力练习题

Listen to the dialogues and write the correct sequence of l-6 as mentioned in the dialogues. A:How do I search books from the computer? B:First, key in your PIN number. Then, it goes to the Library's Homepage. Then, you can choose any way you want to

发表于:2019-02-17 / 阅读(97) / 评论(0) 分类 英语听力练习题

Thank you for being here,Fareed.Nice to have you on the show. 多谢你抽空前来 法里德 很高兴你能来上节目 Let's get started first with your background.I do think I know a lot about you. 首先聊聊你的背景 我觉得我很了解你

发表于:2019-02-23 / 阅读(142) / 评论(0) 分类 柯南脱口秀
学英语单词
... and that's flat
a dope fiend
acoustic plaster
adrenal gland (or adrenal body)
advanced air field
aguas de busot
anthocerus
Ballymurphy
bowl game
Bristol Channel
caching proxy
cantigny
car windows
Casavieja
chord progression
coletur
conformite europeene
cosmetic dermatosurgery
cotter mill
craniofacial axis
devoided
discharge current capacity
dischargeable colour
drifting organism
enquote
ensconced
ethyl stannonic acid
exclusive sale
extracapsular zone
formosopyrrhona cinnabarina
fpl
friendship theorem
G-value
Get Sacked
giada
gnawing
gynolatrous
gyulays
Homeward Point
instantaneous stability
insulation puncture
jujuys
Kandila
larboard
limitans ventriculorum sulci
loxodromy
lrtap
Mesyagutovo
microgliomas
Microstegium dilatatum
Millon's reagent
misentreat
newells
Nkoûssa
nonparticipants
ore stocking bridge
ostrogorskis
oxytropis ochrocephala bunge
peor
pertinacious illness
political-minded
porous coating
pronities
pseudoappehdicitis
radon-219
rapidly-expandings
rate of return method
record current
reissued
revaluation of assets law
salvians
santesson
scale of pollution
scelidosaurids
seignory
semi-prime ring
semicanal for tensor tympani
semimicroanalyses
single diffusion type
single-signal recever
spectrographies
spotted Joe-Pye weed
stacking fault array
standard nautical mile
stopclock
Stouby
styremic
subimaginal
submarine quick diving
supertrue
tape stretcher
triceps muscle of calf
triplicate radio circle
tulcingo
twisted pair wiring
ukcs
unfishiness
wascoat
web view
werthan
white elm
win upon sb by degrees