In the TimeValue function, you can pass a string as a parameter containing the time. For the TimeSerial function, however, you can pass the individual parameters (hour, minute, second) as separate numerical expressions.
在 TimeValue 函数中，可以用含有时间的参数来传送字符串；而在 TimeSerial 函数中，则用独立的数字表达式来传送单个参数 (hour、minute、second)。