1. I always overstuff my suitcase when I go on vacation, and then I have trouble closing it.
我每次去度假都会把行李箱装得太满，结果很难合上。

2. He tends to overstuff himself at the buffet, even though he knows it's unhealthy.
尽管他知道吃得太多不健康，但他经常在自助餐厅里吃得太饱。