signal
加入词篮monitor
telephone
receiver
beeper
videophone
operator
radio
phone
extension
telegraph
post
postcode
postage
mailbox
airmail
letter
postcard
ambassador
ambassadress
postman
postmen
stamp
envelope
parcel
address
local
branch
bank
counter
cash
cheque
account
credit
credit
guarantee
lend
security
certificate
protection
interest
deposit
currency
debt
principal
surplus
discount
museum
gallery
exhibition
exhibition
display
treasure
entertainment
roundabout
slide
mask
shadow
grass
kind
type
category
pond
pool
fire
fitness
set
put
fix
mend
school
schoolmate
classmate
schoolboy
schoolgirl
pupil
student
educate
education
kindergarten
nursery
university
lesson
unit
subject
programme
class
P.E.
curriculum
academy
institute
term
honor
glory
honour
degree
bachelor
doctor
master
