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
a hint of jonquil in the air
acoustic homing torpedo
african mathematic program
agonic line of no declination
amyl group
analog signal demodulation equipment
balseria (panama)
Belogor'ye
bent-handle signle-head wrench
black band
body type
cam harmonic motion
chana dal
clod separator
cobble sth together
Combressol
contrabassists
cramras
crystallization course
cuckold's knot
DCWV (direct current working voltage)
declare invalid
dried-out
Eamon de Valera
ecalcarata
edwarde
elephant foot
enamellists
European Coal and Steel Community
exemption system
extra-morainic lake
fluidized catalyst bed
Fluxus
focusing laser Doppler velocimeter
fourscorest
genus Polygonum
gustier
halimeda opuntia lamx.
hand-transmitted vibration
Heterotardigrade
high-voltage diode
hot-water suction pipe
ichthys
inactive serum
joint-owneds
JST
ladenburg
lagarangian equations
leading port
lilium columbianums
limnophlia (adelphomyia) platystyla parallela
lisle thread
literal field
medical science
metropols
Morse twist drill
multiple data call
NAVAVMEDCEN
non-treatments
ovology
partial coincident picture
pepzyme
performance diagram
physical placement
piezoresistive pick-up
plastic silty clay
pole dominance
Popular Front for the Liberation of Palestine
porthole taper slide guide
postponable
promontoires
purchases book
quinquennial
rattle along
reflection altimeter
Regio glutealis
rikshaws
sag
saw tooth waveform
school friends
senile hip arthropathy
sinus histocytosis
slowness
snake hawk
souches
spectrum of toxin
stabilizer force
start of heading
tanned
thread selector
trainglot
trinomialism
tugger hoist
uranium-rod lattice
vapo(u)r velocity
variance from budget
vinyl-guarded
water dispersible zinc stearate
whore around
wooden-body lacquer
yarn tension