Idempotence: merging a state with itself doesn’t change the state; A ∨ A = A. If Alice merges her own state with itself, the result will be the same state she started with.
新年伊始，吉林省辽源市德弘冰雪运动科技有限公司生产线隆隆作响，经过100多道工序，一双双滑雪靴逐渐成型，将被发往吉林长白山、新疆赛里木湖等地的各大雪场。“‘冰雪热’越来越火，我们月产超万套。”公司销售总监鞠丹说。
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