Megahertz measures frequency — how many times something repeats every second — and one megahertz is a million times per second. It is written MHz.

Megahertz這個字量的是頻率 measures frequency（併入前段）——how many times something repeats every second也就是某件事每秒重複幾次——and one megahertz is a million times per second而一個megahertz就是每秒一百萬次。It它 is written MHz寫作 MHz。

You meet it in two places. Radio: an FM station sits at a place on the dial like 100.7 MHz, meaning its wave rises and falls a hundred million-odd times a second, and that number is simply the station's address. Computers: a chip's clock speed used to be given in megahertz (a 500 MHz processor ticks five hundred million times a second), though chips passed a thousand megahertz long ago and we now say gigahertz instead, so the megahertz mostly survives in radio, Wi-Fi, and older machines.

You你 meet it in two places會在兩個地方遇到它。Radio廣播: an FM station sits at a place on the dial like 100.7 MHz一個FM電台會落在頻率表上像100.7 MHz這樣的位置, meaning its wave rises and falls a hundred million-odd times a second意思是它的電波每秒起伏大約一億多次, and that number is simply the station's address而這個數字就只是這個電台的「地址」。Computers電腦: a chip's clock speed used to be given in megahertz晶片的時脈速度以前是用megahertz來表示 (a 500 MHz processor ticks five hundred million times a second一顆500 MHz的處理器每秒跳動五億次), though chips passed a thousand megahertz long ago不過晶片老早就超過一千megahertz了 and we now say gigahertz instead現在我們改說gigahertz（十億赫）, so the megahertz mostly survives in radio, Wi-Fi, and older machines所以megahertz現在大多留在廣播、Wi-Fi，和比較舊的機器裡。

Note the spelling: megahertz is the same in the singular and the plural — 'one megahertz', 'ninety megahertz', never 'megahertzes'.

Note the spelling請注意拼法: megahertz is the same in the singular and the pluralmegahertz的單複數寫法一樣——'one megahertz'「one megahertz」、 'ninety megahertz'「ninety megahertz」, never 'megahertzes'絕對不會寫成「megahertzes」。

It is named after Heinrich Hertz, a German physicist who proved radio waves exist, which is why it keeps its capital H when abbreviated (MHz) even though the full word is lowercase.

It它 is named after Heinrich Hertz是以海因里希．赫茲命名的, a German physicist who proved radio waves exist他是證明電波確實存在的德國物理學家, which is why it keeps its capital H when abbreviated (MHz)這也是為什麼縮寫時H要大寫（MHz）, even though the full word is lowercase即使完整拼寫時是小寫。

A faster clock speed is not automatically a faster computer, by the way — how much the chip does per tick matters just as much, and salespeople have quietly relied on customers not knowing that.

A faster clock speed is not automatically a faster computer順帶一提，時脈速度快不代表電腦一定比較快, by the way（併入前段）— how much the chip does per tick matters just as much晶片每一次跳動能做多少事一樣重要, and salespeople have quietly relied on customers not knowing that而業務員也一直悄悄靠著顧客不知道這件事。