<單字複習>
已選單詞
adulthood
analysis
assessment
beginning
birth
childhood
closing
conclusion
death
death
decay
decline
development
duration
end
eternity
evaluation
finish
future
generation
growth
history
infinity
instant
interval
introduction
judgment
life
lifetime
oldage
opening
phase
prehistory
process
progress
review
stage
start
step
summary
term
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