disability free翻译This is a rare trait - only one in 6,000 people in industrialised countries reaches such a ripe old age. And 90% them are still disability free by the age of 93. 第二句应如何翻译?

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disability free翻译
This is a rare trait - only one in 6,000 people in industrialised countries reaches such a ripe old age. And 90% them are still disability free by the age of 93.
第二句应如何翻译?

而且,他们中90%的人到了93岁会依然健康.
disability-free life expectancy 预期健康寿命

这是少有的一种特性,在工业化的国家,6000人中仅有一位如此高龄的人。他(她)们中90%的人在93岁的时候还依然能够自理。