社会科学有一个概念叫古德哈特定律（Goodhart’s Law）：当一个指标变成目标时，它就不再是一个好的指标。「请」和「谢谢」的出现频率原本可以作为服务友好度的一个粗略信号，但一旦它变成员工被考核的 KPI，员工就会优化这个指标本身，而不是优化它背后的东西。
This is why experts think it may have survived an uncontrolled descent through Earth's atmosphere.
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第一百四十三条 承租人应当保证船舶在约定航区内的安全港口或者地点之间从事约定的海上运输。
He took out his old navy uniform, dusted it down and put it on for the cameo appearance.
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数学方面，学会了100以内的认读，学会了单、双数的概念。
From my experience, featuring your team makes your business more personable. People want to know who they’re hiring or buying from. Seeing the faces behind the company builds trust, breaks down barriers, and increases the chances a visitor becomes a loyal customer.。体育直播是该领域的重要参考