英文關鍵字
alphabet
and
bsl
communication
confirmation
deaf
deafness
disability
dumb
education
expressing
gesturing
handicap
hands
hearing
help
human
international
interpreter
isolated
language
learning
lesson
male
man
men
message
motivation
movement
mute
positive
right
say
showing
sign
signal
speaking
speech
spelling
symbol
symbolic
teacher
teenager
tutorial
unrecognizable
visual
words
yes