"Cows love to eat grass"是牛爱吃草的英文表达方式。

这个表达方式源自牛本身的生态习性。牛是一种草食动物，它们主要以吃草为生。因此，人们用"love to eat"这个短语来描述牛爱吃草这一事实。

下面是一些例句：

"The cows in the pasture are always happily munching on grass." (牧场里的牛总是开心地咀嚼草。)
"Cows are known for their love of grass, but they also enjoy eating hay and grain." (牛以爱吃草而闻名，但它们也喜欢吃干草和谷物。)
"Grass is a cow's favorite food, and it's also an important part of a healthy diet for these animals." (草是牛最喜欢的食物，对于这些动物来说，草也是健康饮食的重要组成部分。)