亚倍频程滤波器

But the HEPA filter for Olivers Vibe got dirty very quickly. And, it was not cleanableit was simply replaceable. When it turned filthy brown, Oliver went back to Target to buy a new filter. Oddly, Target sold the F15 belt for the Vibe, but not the fi

发表于:2018-12-11 / 阅读(70) / 评论(0) 分类 365个英语简短小故事

From VOA Learning English, this is the Health Lifestyle report. In parts of India, it is not uncommon to see people wearing a mask over their nose and mouth. The capital, New Delhi, has some of the world's dirtiest air. The pollution was a call for a

发表于:2019-01-03 / 阅读(65) / 评论(0) 分类 2018年VOA慢速英语(一)月

One of my favorite stories comes from Frank Serafine. 我最喜欢的段子之一来自于弗兰克塞拉凡尼。 He's a contributor to our library, and a great sound designer for Tron and Star Trek and others. 他是我们音效库的贡献者之一,

发表于:2019-01-18 / 阅读(35) / 评论(0) 分类 TED演讲娱乐篇

By Tabinda Naeem Washington, D.C. 21 May 2007 Two years ago, the National Academy of Engineering established the Grainger Challenge Prize for Sustainability. This $1 million award was designed to challenge the world's scientists to develop a practica

发表于:2019-02-03 / 阅读(92) / 评论(0) 分类 2007年VOA标准英语(五月)

vibration 振动 sound 音 tone 音(乐音) musical tone 乐音 noise 噪音 acoustics 声学 psychoacoustics 心理声学 frequency 频率 intensity 强度 time 时间 wave form 波形 pitch 音高 loudness 响度 duration 时值 timbre 音色 (tone

发表于:2019-02-07 / 阅读(46) / 评论(0) 分类 英语口译

vibration 振动 sound 音 tone 音(乐音) musical tone 乐音 noise 噪音 acoustics 声学 psychoacoustics 心理声学 frequency 频率 intensity 强度 time 时间 wave form 波形 pitch 音高 loudness 响度 duration 时值 timbre 音色 (tone

发表于:2019-02-07 / 阅读(37) / 评论(0) 分类 英语口译
学英语单词
AIDH
Aladag
alkyl tosylate
amenity bed
artist-teacher
Atenism
atrichia
brew a plot
broadband modulation
Casagrande liquid limit apparatus
cellarlike
cerberin
chemical priority pollutant
chromate red
chuck roll
coal delivery system
cochliobolus miyabeanus(ito-et kurib.)dreshsler
code-words
Coffea L.
composite components
constituted succession
Contract of Warehouse Keeping
Dantzing-Wolfe algorithm
day-nurseries
deicings
design certified value
design tradeoff
Direct Quote
dos,do's
dyssynthesis
electromechanical frequency meter
exciter field rheostatic type automatic voltage regulator
falloff law
Fascioletta
ferric stearate
Fort Arab
four-sideds
gathering main roadway
gear teeth
ghost plant
globular transfer
glucodistylin
glycolic
hartmann lines net
helmet-mounted display
hush ... up
in direction
index verborum
intra-plant telephone
Jack in the pulpit
jarrock
knob-and-basin topography(rockes moutonnees)
Lappula tadshikorum
logokophosis
lot of land
madges
mammary areola
mass-energy transfer coefficient
Microchiroptera
optically denser medium
oxidation states
patchy vesiculosquamous eczema
pattern design
peace treaties
petroscirtes variabilis
placentule
portray as
quick-freezing
rectal crises
reluctance pickup
remote communication outlet
rough endoplasmic reticulum
rural-urban interdependence
sag
seat wall surrounded pool
seraing
shot-blocking
signalling apparatus
Sir James Paget
smell-brains
space cloth
spot buy
square tape
stand in the doorway
stope development
straight sex
Tabele
table vice
talia
terminate statement
time ball
toer
training bulletin
turn sth out
type of wool
ultraperformance
union
universal-jointed shaft
unlachrymose
VBRA
Võrtsjärv
water space