Their heart rates slowed down, P R and Q T intervals prolonged and blood pressure reduced after exposure, as compared with those before exposure.
工人接触后心电图指标与接触前自身比较，出现心率减慢、PR间期和QT间期延长及血压下降。
No significant differences were found in the heart rate, QRS intervals, Q T intervals, sinus bradycardia, sinus tachycardia and left axis deviation between exposed and control groups ( P >0 05).
其余心率、QRS间期、Q-T间期的数值以及窦性心动过缓、窦性心动过速和心电轴左偏等发生率，两组之间均无差异（P＞0．05）。
And now you will understand how we define the instantaneous velocity at time t which is different from an average velocity between two time intervals.
现在明白了吗，t时刻，的瞬时速度是怎样定义的，与两时刻间的平均速度相比，瞬时速度并不一样。
The distribution of time intervals (T) between large earthquakes is usually considered as an irregular or even stochastic phenomenon.
大地震发生时间间隔（T）的分布通常被认为是很不规则的，甚至是随机的。
The distribution of time intervals (T) between large earthquakes is usually considered as an irregular or even stochastic phenomenon.
大地震发生时间间隔（T）的分布通常被认为是很不规则的，甚至是随机的。
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