英文關鍵字
911
accident
aid
asphalt
bicycle
bicycling
bike
collision
crash
cyclist
danger
dangerous
death
direction
emergency
factor
female
first
guilty
helmet
human
hurt
inattentive
incident
injured
injury
life
negligence
outdoors
pain
regulations
ride
risk
road
rule
rules
safety
speed
street
teenager
traffic
transport
transportation
trauma
unconscious
urban
vehicle
way
woman
young