英汉例句双语例句An ungrateful man (woman) is like a hog eating apples under a tree- never looking up to see where they come from.一个不懂感恩的人就像树下吃苹果的猪，永远不会抬头看苹果是从哪里来的！blog.sina.com.cn词组短语短语the Man -Eating Tree 表演者