利已主义的

例句：

1. 1. She is always thinking about her own needs before helping others.
   她总是先考虑自己的需求，再帮助别人。
2. 2.He was selfish and didn't want to share his toys with his friends.
   他自私，不愿意和他的朋友们分享他的玩具。
3. 3.The selfish man only cared about his own comfort and never thought of anyone else's feelings.
   这个自私的男人只关心自己的舒适，从未考虑过任何人的感受。