英文關鍵字
accident
banana
business
businessman
careful
careless
carelessness
caution
concept
conceptual
danger
dangerous
foot
hazard
humor
humorous
humour
idea
ignorance
injury
lawsuit
man
mistake
oblivious
pedestrian
peel
problem
problems
risk
risky
safety
setback
shoe
skin
slip
slippery
sole
step
stumbling
surprise
tripping
unexpected
unsafe
walking