(nappe 的复数) n. (圆锥曲面的)叶
plural of nappe
n. Sheet; surface; all that portion of a surface that is
continuous in such a way that it is possible to pass from any one point
of the portion to any other point of the portion without leaving the
surface. Thus, some hyperboloids have one nappe, and some have two.

Key Words [00:01.02]关键词 [00:02.04]The Most Common Expressions [00:03.29]最常用表达法 [00:04.55]It all depends. [00:06.86]视情况而定。 [00:09.17]It's up in the air. [00:11.36]沿未确定。 [00:13.56]I haven't decided yet. [00:16.34

发表于:2018-11-28 / 阅读(179) / 评论(0) 分类 零距离李阳疯狂英语口语

Ill pick you up in about twenty minutes, said Grandfather. The children scrambled out of the station wagon. When Grandfather said at breakfast that he needed to pick up some items hed forgotten at the grocery store, the children leaped at the chance

发表于:2018-12-06 / 阅读(123) / 评论(0) 分类 77 The Mystery of the Wild Pon

Background: 一家用来只供宠物飞行使用的航空公司听起来很奇怪,不过美国最新的 Pet Airways 宠物航空改装了几架货运飞机就准备来运送宠物们。宠物的主人们只要付250美元 (大约合人民币1,700元

发表于:2018-12-07 / 阅读(160) / 评论(0) 分类 大千世界

Asies Mi Amor, dulcisima y sensual es miel y flor mi aliento en el dolor me da valor cuando no puedo mas, me ense?a dar, me ayuda a perdonar, asi es mi amor, bellisima y sensual, sentimental amante si

发表于:2018-12-14 / 阅读(116) / 评论(0) 分类 英语歌曲第七辑

Wanna be lazy and productive at the same time? Try a napbecause napping can improve learning. So said U.C. Berkeleys Matthew Walker February 21st at the meeting of the American Association for the Advancement of Science in San Diego. He followed two

发表于:2018-12-24 / 阅读(89) / 评论(0) 分类 Scientific American(二)月

工作累了,就趴在办公桌上小睡片刻,这样有助于提高你的记忆力。据英国《每日邮报》报道,德国一项最新研究发现,白天打个盹不仅可以使人恢复体力,还能帮助大家提高记忆力。 To Lea

发表于:2019-01-02 / 阅读(111) / 评论(0) 分类 60秒科学

The abduction follows the kidnapping of three Spanish aid workers last month. Scott Stearns | Dakra 20 December 2009 Photo: CIA World Factbook Italy's foreign ministry says it is working through all political and diplomatic channels to secure the rel

发表于:2019-01-13 / 阅读(135) / 评论(0) 分类 VOA标准英语2009年(十二月)

Keeping up with the Joneses是一个典型的美式习语,表示“和你的富裕邻居保持同等的生活方式或质量”,这其实是一句讽刺的话,指“和左邻右舍比排场比阔气

发表于:2019-01-18 / 阅读(240) / 评论(0) 分类 英文语法词汇

By Barry Newhouse Irbil 03 May 2007 The U.S. military says it has killed a senior leader of al-Qaida in Iraq who was involved in the kidnappings of several Westerners. Iraqi officials also have announced two other high-profile al-Qaida deaths in rece

发表于:2019-01-23 / 阅读(133) / 评论(0) 分类 2007年VOA标准英语(五月)

歌词如下: Who stole the cookies from the cookie jar? Cindy stole the cookies from the cookie jar. Who me? Yes, you. Not me.Then who? Lindy stole the cookies from the cookie jar. Who me? Yes, you. Not me.Then who? Sally stole the cookies from th

发表于:2019-01-28 / 阅读(123) / 评论(0) 分类 英语儿歌274首

81 一年轻妇女死于药品试验 DATE=8-11-01 TITLE=IN THE NEWS #493 - Testing of Drugs BYLINE=Nancy Steinbach (Start at 1'05

发表于:2019-01-30 / 阅读(117) / 评论(0) 分类 科技之光

By Sarah Simpson Lagos 05 March 2008 A foreign worker taken hostage by gunmen in Nigeria's troubled oil-region has been released. The kidnapping was the first abduction of a foreign national for almost five months and raised fears that a period of re

发表于:2019-02-02 / 阅读(100) / 评论(0) 分类 VOA标准英语2008年(三月)

By Phuong Tran Dakar 15 March 2007 In some parts of Africa, divorce is still considered a scandal. But, as more couples move to Africa's rapidly growing cities, divorce has become less of a cultural shock. Although female divorcees in rural communit

发表于:2019-02-02 / 阅读(172) / 评论(0) 分类 2007年VOA标准英语(三月)

Limited Partnership 有限合伙(名词),一种伙伴关系,一个或多个伙伴承担偿还债务的法律义务,但还债的额度只限于他们各自拥有的金额。 The venture capit

发表于:2019-02-03 / 阅读(206) / 评论(0) 分类 实用英语

当红翻唱女Esmee Denters首张单曲 Outta Here Get me outta here 'Cuz my eyes are burning from these silly tears That you brought when you show me you dont really care And you never loved me, Someone get me outta this place 1 2 3 4 (Right now)

发表于:2019-02-03 / 阅读(130) / 评论(0) 分类 好听的英文歌曲

By Greg Flakus Prescott, Arizona 03 November 2006 watch Forest Fire Prevention In the western United States this year nearly four million hectares of land have been scorched by fire, in the worst wildfire season on record. Twenty-one firefighters ha

发表于:2019-02-05 / 阅读(197) / 评论(0) 分类 2006年VOA标准英语(十一月)

小女孩单曲《Schnappi》 击败众多巨星登上德国流行榜榜首 这个可爱的女童叫约伊.格鲁特曼,哼唱的曲子名叫《Schnappi》 内容是关于一条小鳄鱼,尝试张开口咬它爸爸坚韧的腿部,以及诉说它妈妈如何以它为傲。 05年这个小女孩唱的儿歌风靡德国,击败众多红星而登上德国

发表于:2019-02-07 / 阅读(175) / 评论(0) 分类 音乐咖啡厅

By Naomi Schwarz Dakar 19 October 2007 U.S. embassy officials say they have requested assistance from Chad's government in gaining to the release of an American humanitarian worker being held by rebels in the north. The rebels accuse him of spying fo

发表于:2019-02-07 / 阅读(106) / 评论(0) 分类 2007年VOA常速英语(十月)

By Jim Malone Washington 20 February 2008 Democratic presidential contenders Barack Obama and Hillary Clinton are headed for a showdown March 4 in primaries in Texas and Ohio. Those primaries could go a long way toward deciding who will be the Democr

发表于:2019-02-07 / 阅读(133) / 评论(0) 分类 VOA常速英语2008年(二月)
学英语单词
abaton
acoustic signature
air cock
Arabic figures
Arc of Lowitz
astute
auto-redirects
Bangaon
beet pump
beg, borrow
bidirection superior cavopulmonary anastomosis
blow-by of piston
bludges
boundary determination
buildt
Calophaca sinica
capillary beds
cascade hydropower development
chefdom
chopper stabilization system
confisacte
Connectionless protocol
continuous structure
copper nickel welding rod
crank shaft bearing
deck-operated cargo oil valve
dysmetropsias
Eastern rite
economize raw materials
electrostatic bearing
empirical process
empty-handedness
enmeshing nets
entry and search of premises
fiscal domain
golfing
Gotar lens
gotten stuck in
gut gauze
gypsophyte
had as lief
hemiazygos vein
hexagonal grid
hydroclinohumite
in-line gun
incorporealities
instrument and apparatus
interpulse period
ipecae fluidextract
leucoaurin
Llanilar
logarithmic mean
low temperature separation
magnetic reactance
main entry
Marina di Gienosa
merge all
mesobiosis
methyl valerate
mixed distribution
moose
myodynamic
nonmilitarized
Nouvelle-France, C.de
orthonormalized
permanent contact
phytosis
Pont-sur-Sambre
rahaman
Ramus communicans cochlearis
reaeration rate
reference phase scale
refunctionalized
regent's
reverse head
rotary voltmeter
rozye
salivaaspirator
scherr
scripturalness
security coefficient
Sedobrol
shade-guide
space queens
stahr
sulphochlorination
suture zone
Sǒjosǒnman
tapered cowl
telephone trunk
the FAA
tiyin
total electrical charge
total reflection
trumpet-shaped ruby laser
unexchanged
uranium fission
vertical centrifugal machine
vertical cylinder screen separator
whirling cutter milling
wodde
yellowier