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嗯，动作组只需要一个，因为即使是同一个动作组对象你也可以用“使用动作组时”这个条件自定义该动作组的名称，你要调用哪个动作组就填哪个动作组的名称即可，所以不需要多个动作组对象（官方估计就是这样直接限制动作组只能有一个对象了）
