例句：Video games that allow players to buy digital items using real money must now carry a special warning icon on the box under new rules designed to stop children unwittingly spending hundreds on in-game purchases.

翻译：根据新的法规，允许玩家用真实的货币购买虚拟道具的电子游戏必须贴上一个特别警示的标签来杜绝孩子在不知不觉中在游戏里消费几百元。

unwittingly 稀里糊涂，不知不觉。

近义词: unconsciously 下意识地 inadverdently 不经意间，并非故意。