时间:2018-11-30 作者:英语课 分类:英语专业四级听写


英语课
Passage 19
Finding the Direction and Location
How can you tell which direction? By day, look for the Sun. It is in the east in the morning and the west in the afternoon. At night, use the Big Dipper to help you find the North Star. It would be better to bring a compass because its needle always points north.
How do you know how far you have gone? You could count every step. Each step is about two feet. You’d better wear a pedometer which is a tool that counts steps. If you know where you started, which direction you are heading, and how far you have gone, you can use a good map to figure out exactly where you are.
Today there is a new way for travelers to figure out where they are. It is the GPS. It has 24 satellites that orbit 1 the earth and constantly broadcast their positions. Someday you may carry a small receiver as you hike and use GPS to find out if you are there yet!


1 orbit
n.轨道;vt.使沿轨道运行;使进入轨道运行;vi.沿轨道运行,环行
  • The space rocket was launched and went into orbit.宇宙火箭发射后进入轨道。
  • We can draw the earth's orbit round the sun.我们可以画出地球绕太阳运行的轨迹。
学英语单词
aataaa
AI winters
anterior tuberosity
bacterial metabolism
be cheesed off
beihai park
benzene formula
biotrak
bononia (vidin)
brain stem injury
branlin (la branlin riviere)
Bucheke
central serous retinopathy
chain spiral
charge, point
concentration meter
conquinamine
consular certification
credit for child and dependent care expenses
croches
deepening of capital
degree of difficulty
disclaundered
distributing oil box
dual-pane
electronic sea-wave recorder
expense of performance
feed equilibrium
Fimbristylis polytrichoides
finishing compound
fire power umbrella
gas-proof machine
grisliest
hackle comb
Heaviside layer
high countervoltage triode
Hokmabad
impedance conversion
incineration technology
infiltrative pulmonary tuberculosis
intercoupled
Islamicism
joint and several liability
Kinnevik
Krasnoborsk
large quantities
lean bow
lining carrier
low noise receiver (lnr)
low-grade polymer
loxogramme ensiformis ching
macadamia tree
managed entity
marine forum
mcgilvray
Neuro-trasentin
neuroendocrinologist
nonvillainous
nucleus quintus
Opisthopora
organo metallics
parietal placenta
partel
payload bay
PECT ,PET
permafrost phase-analysis
plusperfects
polychlorparaffin
positive upward path
posttraumatic neurosis
praseodymium sulfate
premium-gift
pressure radius
proabortionists
product topology
professional business
properation
puddings and pies
radial migration
saturation noise
sawder
semeniuk
Skendleby
spacer shaft
spade-works
speech-baseds
steep dip
stock minded
successive quadrature
Thatch, Edward
Tournaician
traveling-wave tube oscillator
trifluoramine
triostin
ugglesome
undercapitalized corporation
valve-off
wagonsful
weape
whistle and siren control system
whistle-stopping
wormeries