The only experience I can honestly say that was not up to my expectations was dining on the train.
问题描述：
The only experience I can honestly say that was not up to my expectations was dining on the train.
为什么用dining,而不用to dine
答
dining on the train 是动名词短语,在火车上吃饭
to dine 这样的不定式,有表将来的意思,而这里没有表将来之意,所以用dining