Refers to a child who has not yet reached adulthood, a young boy or girl, often implying immaturity or inexperience.
他虽然年纪轻轻，但在大事上从不含糊，并非五尺竖子，足以担当重任。
Though young, he is never vague on important matters; he is not an inexperienced child and is fully capable of handling significant responsibilities.
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