Early physical attractiveness predicts a more socially effective personality in adulthood. Early physical appearance may serve as a slight but consistent predictor of how well a person navigates social situations later in life.
所以张清森突发奇想，做了一个几乎不算创新但特有效的改动，把线材做成 0.5米，1米，1.5米，2米，3米，5米 等等不同长度，结果自然大受欢迎。
。爱思助手下载最新版本是该领域的重要参考
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