mutual club

例句：

1. 1. Theyformed a mutual club to help each otherwith their studies.
   他们成立了一个共同俱乐部，互相帮助学习。
2. 2. The mutual club wasestablished to promote cultural exchanges between thetwo countries.
   这个共同俱乐部的成立是为了促进两国之间的文化交流。
3. 3. Members of themutual club often meet for social activities anddiscussions.
   共同俱乐部的成员经常参加社交活动和讨论。