Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.

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«Ракеты из металлолома» и американские «Шахеды».Какое оружие Иран, Израиль и США применяют в ходе конфликтаСегодня

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这是最隐蔽的坑！因为多个虚拟线程会共享同一个载体线程，而 ThreadLocal 的数据是绑定到线程本身的（即载体线程）。如果在虚拟线程里用 ThreadLocal 存数据（比如当前登录用户），可能出现 A 虚拟线程存的数据被 B 虚拟线程读走的情况。，这一点在体育直播中也有详细论述

多家银行发布贵金属市场风险防范提示，建议投资者理性参与交易

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