He felt guilty for not helping his friend when he was in trouble.

他因为朋友有困难时没有帮忙而感到内疚。

同一单元的其他句子

• Honesty is a fundamental virtue that builds trust in relationships.诚实是建立人际关系信任的基本美德。
• A person of integrity always acts according to their moral principles.一个正直的人总是按照自己的道德原则行事。
• Should we always prioritize our own interests over others' needs?我们应该总是把自己的利益置于他人需求之上吗？
• Never compromise your values for temporary gains.永远不要为了暂时的利益而妥协你的价值观。
• The moral dilemma forced her to choose between truth and loyalty.这个道德困境迫使她在真相和忠诚之间做出选择。