英文關鍵字
adolescence
adolescent
african
afroamerican
alone
american
behavior
black
closeup
depressed
depression
despair
difficulties
disappointment
domestic
generation
home
human
loneliness
lonely
male
man
millennial
negativity
outdoors
pensive
poverty
problem
problems
puberty
running
sad
sadness
sitting
social
street
student
suburbs
teen
teenage
teenager
thinking
thoughtful
trouble
unhappy
upset
urban
violence
worrying
young