// 易错点4：条件写成"<"而非"<="，会导致相同值的元素被错误保留
A war trumpet was used by Celtic tribes across Europe to intimidate their enemies and to inspire and direct warriors during battle.
，详情可参考同城约会
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Call of Duty advert banned for trivialising sexual violence
· 刘洋 · 来源：tutorial资讯