时间:2019-01-22 作者:英语课 分类:自然百科2010年


英语课

 There's no doubt that a stream of giant bubbles could theoretically have sunk the U.S.S.'Cyclops'.


 
Whether the bubbles were there or not, that's not for us to say. But I'll leave that up to the oceanographers.
 
But could methane 1 gas also explain the disappearance 2 of planes?
 
There would be a change in conditions in the air above the sea surface if those methane gases escape. And it has been suggested by some that this would affect the lift of the aircraft.
 
After leaving the water, the methane would rise straight into the atmosphere. The gas is lighter 3 than air so it would continue upward until dissipating but could still potentially disrupt planes at low altitudes.
 
Instructors 4 at a flight school in Florida want to find out what happens when a plane flies into a cloud of methane.
 
Right now, we're flying in a 'Diamond' DA-42 flights simulator. It's an actual replica 5 of the twin engine, small airplane. It simulates the controls, the fuel and all the instrumentation of an actual airplane.
 
Their simulator will replicate 6 the change in air conditions when a plume 7 of methane enters the surrounding atmosphere.
OK. We're flying the simulator towards Key West International. We're approximately thousand feet. We're a few miles out and here we're coming in on the approach path for the airport. And we're gonna simulate what happens if we watch the altimeter. On both these we will see immediate 8 change as we fly into that cloud of methane.
 
The altimeter determines altitude by measuring outside air pressure. Methane is half as dense 9 as air. So when the cloud envelopes the plane the effect on the instruments is shocking.
 
And all the sudden, that jumps up to approximately 2000 feet. Thomas's now responding to that by descending 11 the airplane 'cause he needs to maintain 1000 feet.
 
The altimeter shows the plane is climbing rapidly. The pilot trusts his instruments and tries to drop to an altitude of 1000 feet. But now he's dangerously close to the ocean's surface.
 
And as we descend 10 we're getting closer and closer to the water, but looking outside without reference to land or ships on the water, it's very hard to judge our altitude. And he's trained this instrument power to trust his instruments and not look outside the plane.
 
The plane's instruments continue to confuse the pilot.

n.甲烷,沼气
  • The blast was caused by pockets of methane gas that ignited.爆炸是由数袋甲烷气体着火引起的。
  • Methane may have extraterrestrial significance.甲烷具有星际意义。
n.消失,消散,失踪
  • He was hard put to it to explain her disappearance.他难以说明她为什么不见了。
  • Her disappearance gave rise to the wildest rumours.她失踪一事引起了各种流言蜚语。
n.打火机,点火器;驳船;v.用驳船运送;light的比较级
  • The portrait was touched up so as to make it lighter.这张画经过润色,色调明朗了一些。
  • The lighter works off the car battery.引燃器利用汽车蓄电池打火。
指导者,教师( instructor的名词复数 )
  • The instructors were slacking on the job. 教员们对工作松松垮垮。
  • He was invited to sit on the rostrum as a representative of extramural instructors. 他以校外辅导员身份,被邀请到主席台上。
n.复制品
  • The original conservatory has been rebuilt in replica.温室已按原样重建。
  • The young artist made a replica of the famous painting.这位年轻的画家临摹了这幅著名的作品。
v.折叠,复制,模写;n.同样的样品;adj.转折的
  • The DNA of chromatin must replicate before cell division.染色质DNA在细胞分裂之前必须复制。
  • It is also easy to replicate,as the next subsection explains.就像下一个小节详细说明的那样,它还可以被轻易的复制。
n.羽毛;v.整理羽毛,骚首弄姿,用羽毛装饰
  • Her hat was adorned with a plume.她帽子上饰着羽毛。
  • He does not plume himself on these achievements.他并不因这些成就而自夸。
adj.立即的;直接的,最接近的;紧靠的
  • His immediate neighbours felt it their duty to call.他的近邻认为他们有责任去拜访。
  • We declared ourselves for the immediate convocation of the meeting.我们主张立即召开这个会议。
a.密集的,稠密的,浓密的;密度大的
  • The general ambushed his troops in the dense woods. 将军把部队埋伏在浓密的树林里。
  • The path was completely covered by the dense foliage. 小路被树叶厚厚地盖了一层。
vt./vi.传下来,下来,下降
  • I hope the grace of God would descend on me.我期望上帝的恩惠。
  • We're not going to descend to such methods.我们不会沦落到使用这种手段。
学英语单词
'toons
absolute mean deviation
aggregometer
Agropoli
air-cooled graphite moderated reactor
aldehydic hydrogen
allomerisms
apex of earth motion
apodized aperture
beat-box
Bidens coronata
branded goods
broad-bean plants
Bulsār
candelabras
cheque board scan
cismadinone
Cleveland steamers
cmos gate array
contiguous sea area
cotton core
covariants
dahira obliquifascia
Danjuro
darkness adaption
directed set
divine-mind
dorsal tegmental nucleus
economic recession
epidote amphibolite
femtowebers
framework of fault
get too big for one's boots
hard right
Harmsworth, Harold Sidney
high-moisture grain silage
housekeeping digit
hydrofine
hydroiodination
industrial radiology
Itard-Cholewa sign
kaga
Kovel'
latricia
let something slide
manitology
meristoderm
Montsec
neutral position of brush
NOESY
nondefinable
nonstructural
observe measure s
periodontologists
physical shape
pincloth
polydelphous
polymorphic transition
poure
pure space science
quality circles
qualling
quantum step
Raphidia
recall of witness
regulize
reinforced concrete fence
renal embolism
reticulated veins
round mallet
scifier
selective conversion
self-murderer
sensitive plate processing
shaker convyer
sheet-ice
side tilt car
slimy waste material
small business management
smoothing by free hand
soil depleting crop
solar blind photomultiplier
speed matching
ST_easy-and-difficult_causing-difficulties-for-oneself-or-others
state correspondence error
strip a peg
super highway
tackle pulley
tar cooler box
telegraph selector
the book of fate
thread mill
three-putts
tighter than the barkon a tree
trisomy 18 syndrome
undivined
uniflow cooler
value insured rail traffic
wall of sound
whoopee do
Yemurtla
zookeep