The AHA's chart still USES the 220 minus age formula, but has a wider zone of 50 to 85 percent of your Max heart rate.
该协会的表中仍然沿用220减去年龄的算法，但是讲区间扩大到了最高心率的50%到85%。
Start with 180 minus your age (a) for the fat burning zone upper limit target heart rate (z).
用180减去您的年龄，得到脂肪燃烧区的上限值。
Karp does point out that the "220 minus age" formula is an estimate and can be off by 10 to 15 beats per minute.
Karp同时强调到“220减去年龄”的这个公式只是个估计值，因此它能减去10 ~15下每分钟。
Using a heart monitor, exercise so your heart rate is between 50% and 85% of your maximum heart rate (220 minus your age).
可以采用心脏监测器，运动时心跳频率为最大心率(220减去你的年龄)的50% - 85%。
And now, using the same space-based observatory, the age of the universe has been refined even further, adding another 20 million years to the total (plus or minus 0.11 billion years).
但现在，通过相同的空基观测设备，宇宙的年龄已经被进一步的精确到在以前的基础上增加2千万年(前后误差1.1亿年)。
So scientists devised a test to measure the molecules-and use that to infer someone's age based on his or her blood. The results appear to be accurate to within plus or minus nine years.
据此，科学家们设计了一种测试方法来检测分子，并利用它以某人的血液来推断其年龄，测定结果能精确到上下9年内。
The formula for obtaining a target heart rate equals 220 minus your age x 60% - 85%, depending on the individual's fitness goals and physical condition.
计算公式为：目标心跳次数区域=220—年龄×（60%〜85%），它并不是一成不变的，可以根据健身者的锻炼目标和身体状况来决定。
The formula for obtaining a target heart rate equals 220 minus your age x 60% - 85%, depending on the individual's fitness goals and physical condition.
计算公式为：目标心跳次数区域=220—年龄×（60%〜85%），它并不是一成不变的，可以根据健身者的锻炼目标和身体状况来决定。
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