监测值是瞬时浓度值，测次愈少代表性愈差。
Thus, the monitoring values obtatined can only represent the instantaneous concentration of pollutant.
该心率监测仪既在存储器中存储了瞬时心率值和平均心率值，又经简单运算在液晶显示屏上显示出瞬时心率值和平均心率值。
This monitor not only stores the instantaneous and average values but also displays them on the liquid crystal screen through simple calculations.
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