1.We believe in hard work, plain food, simple clothes and no luxury of any kind.
我们信仰的是刻苦耐劳、节衣简食，无任何奢侈可言。
2.As the bowls keep coming, the abbot is careful to point out that he normally eats very plain food.
菜不断地被端上来，方丈矜持地说自己吃饭一般很简单。
3.It's because a donkey eats simple fodder. And we also eat plain food.
驴子吃得简单，我们吃得也随意啊。
4.He is so hungry that he will relish plain food.
他饿极了，素淡饭食也会吃得津津有味。