平均有效直径

The Moon 月球 We find that the moon is about 239,000 miles (384,551 km) away from the earth, and, to within a few thousand miles, its distance always remains the same. Yet a very little observation

发表于:2018-12-05 / 阅读(54) / 评论(0) 分类 有声英文阅读

Sand 沙子 If you look around you, you can find sand very easily. 你若环顾四周,就很容易发现沙子。 Sand comes from rocks. 沙子源自岩石。 Each grain of sand is less than 2 millimeters in diameter. 每粒沙子的直径小于两毫

发表于:2019-01-10 / 阅读(53) / 评论(0) 分类 与美国小学生一起学英文第5册

In the storeroom 在库房 A:Where can I find a spare hose for the pump? A:我在哪里可以找到一跟备用的机泵软管? B:What size do you need? B:你需要什么型号的? A: 25 mm diameter. A:直径25毫米的。 B:They're at the back o

发表于:2019-01-14 / 阅读(58) / 评论(0) 分类 职业技术英语口语

A: I am looking for a pan. B: No problem. What size would you like? A: A big one would be nice. B: How about this one? It's our biggest16 in diameter. A: Oh, yes. I like that one. But it's too heavy. B: Okay, try this one. It's made of aluminum. A: O

发表于:2019-01-20 / 阅读(94) / 评论(0) 分类 购物英语对话

A: I am looking for a pan. B: No problem. What size would you like? A: A big one would be nice. B: How about this one? It's our biggest16 in diameter. A:I like that one, but it's too heavy. B: Okay, try this one. It's made of aluminum. A: This is muc

发表于:2019-01-21 / 阅读(57) / 评论(0) 分类 购物-Shopping

Tree climbing: Part 2 NB: This is not an accurate word-for-word transcript Dan: Hello and welcome to this weeks 6 Minute English. Im Dan Walker Smith and today, for the second part of our tree climbing programme(节目,计划), Im joined by Kate.

发表于:2019-02-05 / 阅读(71) / 评论(0) 分类 六分钟英语
学英语单词
ACEI
anadenia ventriculi
annual power generation
asis
athyreotic cretinism
b-listest
bonus share
bound theorem
Brandeis , Louis Dembitz
brohanski
cadmium
carta
catalog management
chance of a profit
charging structure
clorinda
corner bears or short positions
customs fees
dance-pop
deck man
denumerable outcome variable
diabrochomorphism
diastematomyelia
dibasic calcium phosphate
dinting
disabling injury index (dii)
Dot blot
drain hat-box
dwarves
emigrant ship
erbes
extrusion by solution
fanjet engine
fibre coating
fireless
fleeted
Forester, C(ecil) S(cott)
fractional distribution
free radical initiation
given credit to
Grand Old Duke of York
grants in aid for education
graphic memory
Great Red Spot
guessed password
heavy-weight drilling fluid
high-density magnetic disk
hoe scraper
hold it against me
holocheck card
impedings
injury of infrapatellar fat pad
invert glass
isotope mixing
koprophagous
law of domestic relation
macular hole
male investment
methyl-methacrylate
named object
nourish
nuclear transmutation energy
opus incertum
ourouve (papua new guinea)
Padcaya
paravertebral irradiation
pentegraph
perpensive
pinsents
plate dinner
pleuropneumonia - like organism
prescutellar
pscudangina
pumping time
range of input voltage
retainer lock
return flow combustion chamber
Reuters
scalpriform incisor
Schede's clot
schottky bipolar microcomputer
semigovernmental
shock shoe
space policy
spherical azimuth
steady compaction stage
stepdance
stow down
sub-merged pier
sx-e
tailoring bandgap
tchetverts
telemetering rocket
the droits of Admiralty
Theatre of the Street
tomfools
transverse nasal groove
unbrutized
waste cell melt
white squire
window-seat
Zest anchor attachment