Pure-tone-average 平均听阈
pure tone average 纯音听阈均值
average tone
平均语气
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It turns out the the average 30-35 year old person will experience roughly a 25 percent decline in his or her muscle strength and tone by the age of 70-75, and up to a 50 percent decline approaching the age of 90.
FORBES: Why Strength Training May Help You Live Longer
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