Every seven years, a healthy human body completely replaces every single bone cell.

每七年，健康的人体的骨骼细胞会更新一遍。

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About every seven years, your body replaces the equivalent of an entirely new skeleton.

每七年，你的身体就会有一个完整的新骨架生长出来。

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This continuing research has followed 6, 000 people since 1956, testing them every seven years.

该研究自1956年起跟踪调查了6000名受试者，每隔七年对他们进行一次测试。

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Current law requires that pipelines be inspected every seven years, although those located near population centers necessitate more frequent oversight.

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In times of distress, his relics were carried around the town -- a procession which is now carried out every seven years.

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Dr Amin Karami told a meeting of the American Heart Association that pacemaker batteries needed to be replaced approximately every seven years.

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