英文關鍵字
adult
audience
brainstorming
business
casual
caucasian
center
class
coach
concentration
conference
confidence
congress
convention
cooperation
corporate
creative
crowd
education
event
explaining
finance
focus
foreground
gesturing
group
hand
human
ideas
indoors
instructor
intelligence
large
listening
meeting
men
occupation
office
participant
partnership
person
presentation
professional
professor
row
seminar
sitting
smart
success
teaching
team
togetherness
training
university
young