词汇网络: selfish

Altruism is the disinterested and selfless concern for the well-being of others. It involves acting out of a desire to help people without expecting any reward or personal gain in return.

A person's essential being that distinguishes them from others, especially considered as the object of introspection or reflexive action. It can also refer to one's particular nature or personality; the qualities that make one individual or unique.

The ego is a person's sense of self-esteem or self-importance. In psychology, it specifically refers to the part of the mind that mediates between the conscious and the unconscious, dealing with reality.

Selfishness is the quality or state of being concerned excessively or exclusively with oneself. It describes behavior where a person seeks their own advantage, pleasure, or well-being without regard for others.