這樣車頭碰撞時較安全。但是後麵撞過來就是另一回事了。。。
https://www.washingtonpost.com/local/trafficandcommuting/study-of-rear-end-crashes-finds-head-injuries-from-rear-facing-child-seats/2015/11/01/589095e2-7cf4-11e5-b575-d8dcfedb4ea1_story.html?utm_term=.a273489031ca