网页兆赫兹 (MHz) 单位定义. The megahertz is a multiple of the unit hertz (Hz) for frequency. The International System of Units (SI) defines the prefix mega (M) as a factor of one million or 10 6 or 1000000. Per this definition, one megahertz is 10 6 hertz.
网页柯林斯英汉双解大词典. megahertz /ˈmɛɡəˌhɜːts/ ( megahertz ) 1.N-COUNT A megahertz is a unit of frequency, used especially for radio frequencies. One megahertz equals one million cycles per second. 兆赫 [num N] [1]