a dog in the manger

• A ： if you don ' t know how to skate , why don ' t you give the skates to me ? don ' t be a dog in the manger
  你若不知道怎么滑冰，干吗不把冰鞋给我？别占着茅坑不拉屎了！
• Don ' t be such a dog in the manger . lend your bicycle to him since you will not go out this afternoon
  别这么不够朋友，既然你今天下午不出去就把自行车借给他用一用。
• Don ' t be such a dog in the manger ! just lend him your bicycle since you ' re not going out this afternoon
  别占着茅坑不拉屎了！把自行车借给他呀，你今天下午又不出去。
• She refuses to share the big room with the others , she is really like a dog in the manger
  她自己一人住在这样一套大宅院里却不让其他人住进来，她真是一个极端自私的人。
• He borrowed a lot of books from the library but he didn ' t read any of them . he was really a dog in the manger
  他从图书馆借了很多书，但一本也没有看过，真是占着茅坑不拉屎。