音标:[ˈpɔzitivz] ;
n. 确实( positive的复数形式 ); 正片; <语>原级形容词; 明确性
n. the primary form of an adjective or adverb; denotes a quality without qualification, comparison, or relation to increase or diminution
n. a film showing a photographic image whose tones correspond to those of the original subject

Frog census volunteers misinterpreted recorded frog sounds in the field, leading researchers to suspect that frog populations may be even lower than thought. Declining frog populations are considered an indicator of environmental damage. But new rese

发表于:2019-01-02 / 阅读(340) / 评论(0) 分类 60秒科学

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute Declining frog populations are considered an indicator of environmental damage. But new research finds that frogs might be doing even worse than we thou

发表于:2019-01-08 / 阅读(293) / 评论(0) 分类 Scientific American(八)月

Larry和李华一起坐地铁回家。今天我们要学两个常用语:get the ball rolling和mull it over. LH: Larry, 这两天天气真好,我看,过不了多久树就要发芽了。我真巴不得春天马上就到。 LL: Me too. I can't wa

发表于:2019-01-15 / 阅读(276) / 评论(0) 分类 美国之音《流行美语》

Grammar Girl here. Todays topic is appositives. Guest-writer Bonnie Trenga writes, Today we have to decide if information is essential or extra, because if its extra well need some extra commas. The concept Im referring to is called an appositive. A

发表于:2019-01-30 / 阅读(418) / 评论(0) 分类 英语语法 Grammar Girl
学英语单词
4NF
anti-fundamentalism
anticomet tail
arr
atrophy of endometrium
auditory perceptions
bacteria amylase
Blanket Treatment
blind hinge
cable reel capsule
chicken cannon
church-towers
clarksboro
cooldown rate
core fuel temperature
ddview
desmethyl-limipramine
direction of scanning
disbarrable
do one's thing
ecosystem culture
equality is equity
external short-term liabilities
field output
football pools
fulled aperture
gatewatching
geographical control panel
geologic medium
get employment
guidance code
H waveguide
harshish
heavy fuel oil purifier
Heteropygous
hexachlorobenzenes
Hood Rat
huarizos
idioglossias
igc
inhibins
interplayings
jan swammerdams
keep pace (with)
Labuha
Lallemand electronic camera
leewoods
ligamenta interspinalia
local air flow
lull
marryings
mass fragmentography
mcardle
memory reference address
Microprocessor Supervisor
Microsoft Certified Systems Administrator
monetarian
monobath processor
narbones
nontan
not on the map
notified
nydegger
ossa suffraginis
Owen, Sir Richard
oxolamine
polar hemisphere
power budget
produced goods
psychrometrical
Qi Vampire
recapitalized
reflection point
repair platform
roentgenoluminescence
sandunies
sandworm disease
sclerospora macrospora
scrape one's chin
Shahrābād
snelson
soil anti-erodibility
space frame work
special road oil
spinner culture
start-stop telegraph signal distortion tester
state appropriation account
stereotyped response
Tephrocactus
throat abscess
transportions
traumatic idiocy
Trient, Gl.du
twin shear slip field theory
unconcurrent
very shallow water wave
walk along the road
wave-form
wide wales
Wohlwill
xuan