自行車交通事故案例宣導影片
\ fullscreen mute 00:00 15:21 embed close space play / pause esc stop f fullscreen shift + ← → slower / faster (latest Chrome and Safari) ↑ ↓ volume m mute ← → seek . seek to previous 1 2 … 6 seek to 10%, 20%, …60% 自行車交通事故案例，熱愛自行車運動的人請注意