You can take a 60 second count of the heartbeats , take for 30 seconds and multiply by 2 , or take for 15 seconds and multiply by 4 . compare your heart rate with the target heart rate 可以数六十秒,或者数三十秒再乘以二,又或者数十五秒再乘以四。将所得心跳率与目标心跳率比较。
数: frequently; repeatedly六: a surname可变放大系数六极管: variable-mu hexode数路供电用电池组: banked battery数列转换处理器: atp数驴子: 84.abu all counts his donkey; abu all counts his donkey数列修匀: smoothing of number sequence数律分析法: harmonics数列算法分析: fib's algorithms analyses数率: numerical ratio数列生的: pleuristichous数论: number theory数列模式: sequencing models