英文關鍵字
aerial
animal
animals
antenna
antennas
bird
birds
broadcast
broadcasting
cellular
communication
communications
connection
construction
discussion
electronics
frequency
group
interface
loneliness
message
messaging
migration
mobile
motion
network
ornithology
phone
radio
receive
repeater
signal
sky
technology
telecommunication
telephone
television
tower
transmission
transmit
transmitter
transmitting
travel
tropical
website
wildlife
wing
wireless