... 平均龄期 mean instar 平均寿命 mean longevity 平均分隔距离 mean separation distance ...
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mean longevity
意思是长寿
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Most of us know that greater longevity and rising health care costs mean we may not be able to afford to retire at the traditional age of 65.
FORBES: New Study: Working Until Age 70 Isn't Enough
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