[译] 听见“轰隆”一声，我回过头去，看见一辆轿车撞在电线杆上。
[误] Hearing a crash, I turned back and saw that a car had hit a lamppost.

[正] Hearing a crash, I turned round and saw that a car had hit a lamppost.
[注] turn back 表示“返回，走回原地”。例如：He got tired and turned back.他感到疲乏，就折身返回。turn round/around才表示“转过身去”，“掉头”。