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咫：古代长度单位，周制八寸，合今市尺六寸二分二厘；咫尺：比喻距离很近。比喻距离虽近，但很难相见，象是远在天边一样。
[a short distance away,and yet poles apart—see little of each other though living nearby] 相距很近,却像远在天边,形容相见之难
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