un. 真空密闭容器;真空密封容器

She inspected the carpet for small items. She saw a paper clip and a rubber band. She picked them up. She put them into a little box on the kitchen counter. She plugged in the vacuum cleaner. She turned on the switch. The cat ran out of the room. She

发表于:2018-12-07 / 阅读(55) / 评论(0) 分类 原版英语小短文

Oliver went to Target to buy a new vacuum cleaner. The vacuum cleaners at Target cost $60 to $500. The expensive ones were too bulky and, of course, too expensive. He bought the cheapest one in the store: a Dirt Devil Vibe. Its label claimed that it

发表于:2018-12-11 / 阅读(57) / 评论(0) 分类 365个英语简短小故事

This is Scientific American 60-Second Science. I'm Cynthia Graber. This will just take a minute. The fridge is one of your home's biggest energy hogs. Better insulation can make refrigerators much more efficient. And a panel encasing a vacuum is one

发表于:2018-12-24 / 阅读(64) / 评论(0) 分类 Scientific American(五)月

[00:17.11]Have you ever thought about what you would save from today to show to people in the future? [00:24.19]Some people are thinking about it. [00:27.35]They are involved in a project to save objects in a container that is not to be opened until

发表于:2018-12-26 / 阅读(83) / 评论(0) 分类 美国英语听力80篇

Tight-lipped Tight with someone 今天我们再给大家讲解两个以 tight 这个字为主的习惯用语。我们要先给大家介绍一个你们经常会用到的一个字,那就是: tight-lippe

发表于:2019-01-11 / 阅读(87) / 评论(0) 分类 美国习惯用语

Whats A Good Insulator? How about air? Air is, in fact, a pretty good insulator, which is why styrofoam keeps things hot. Its full of air. But even better than that would be a vacuum. Because theres nothing in it to heat up, heat cant conduct through

发表于:2019-03-06 / 阅读(107) / 评论(0) 分类 英语时差8,16
学英语单词
8-membered
a year from today
abandons ship
abudefduf bengalensis
acetyl butylaniline
actinism
ageing voltage
aimantine
allium ostrowskianum rottler
askar
baetyls
bambaataas
bed-and-breakfast
bird cherry trees
blocked level
boiled fur
brachiators
bushing electric
cable grip
cash item
chapatties
checkout stand
cynoglossum officinales
dieselizations
digital integrated logic
dress pattern
emulex
exanthemata
explosive wound
extramedullary plasmacytoma
fictional character
fundamental lexical hypothesis
fungiclor
gejdenson
generalized mass
get too big for one's breeches
Ghannouche
gifblaar
Grissel
hoe dipper
hyperuricaemic
induced plasmon-mutation
inertia vector
iWPS
lachesilla pedicularia
laguerre transformation
landlord-tenants
laser therapy
lime salt
lyht
m-audios
make the round s
marillier
monsoon disturbance
Montbarry
morphotropism
objectors
offboarding
palmipedous
paper wasps
partial summation
pathognomies
pergastritis
periconia lateralis
pinch pass mill
Poa sphondylodes
porkpie
procedural command language
qsls
quicksetting level
Raphistemma
rasgulla
rechanneling
redox meter
round building
round-about method of production
shaft of anchor
simulation velocity
sludge number
soil bio-geochemistry
something more
space dosimetry
Spathularia
stack bottom
staking hammer
starting indicator
storage overflow
tailed epithelium
taken with the mainour
temperature thermostat
tetrapolythionate
third eyes
Tipadipa
took precedence to
trap beater
unintentional island
urethroblennorrhea
use immunities
valley board
Villa Alemana
would have liked to
xig