A:I wish you wouldn't be so selfish.

A:我希望你别太自私。

B:Selfishness is one of human being's instincts. It is very difficult to get it out root and branch.

B：自私是人类的本性之一，想连根拔除是很难的。

A:But you should at least consider your son's future.

A;但是你起码得替你儿子的未来想想。

B:His mother, not me, should do this.

B：是她妈妈应该这么做，不是我。