Calculates a serial time value from the specified hour, minute and second (parameters passed as strings) that represents the time in a single numerical value. This value can be used to calculate the difference between times.
根据作为字符串传送的指定时、分和秒参数计算以单一数值表示的顺序时间值。此值可以用来计算两个时间之间相差的时间。