4. A member may only join this prom

4. A member may only join this promotion once.

Results (Chinese) 1:

4.一名成员只可加入此优惠一次。

Results (Chinese) 2:

4.会员只能参加此促销活动一次。

Results (Chinese) 3:

4。一个成员可能只加入这个促进一次。