Only when this problem is solved effectively can we maintain a stable and harmonious society.
只有当这个问题得到有效地解决时，我们才能维持一个稳定和谐的社会。
Only when we're polite to others, can we maintain a pleasant relationship with them.
只有当我们待人礼貌时，我们才能和他人维持愉快的关系。
Only when we're polite to others, can we maintain a pleasant relationship with them.
只有当我们待人礼貌时，我们才能和他人维持愉快的关系。
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