- 1馬赫（馬赫 1＝音速；也說馬赫數）
Mach is a way of saying how fast something is moving compared with the speed of sound, especially a fast aircraft. Mach 1 is the speed of sound. Mach 2 is twice that, and so on. People say “at Mach 2,” with the number after the name. It is not a unit like per hour on a car ; it is a comparison, and the real speed of Mach 1 changes a little with the air — warmer or colder, high up or near the ground. Pilots, engineers, and news stories about jets use it. We keep a capital M because it is a person’s name used as a measure: Ernst Mach, an Austrian who studied in air. Though actually, in loose talk someone may say “a Mach 2 jet” just to mean “very, very fast,” without doing any real sums.
組成The speed sense is the family name of the Austrian physicist Ernst Mach, used as a unit. English did not build it from smaller meaning-pieces. The same spelling is also a surname in several languages, with other origins (short forms of Slavic names beginning with Ma-, sometimes German Mache “work”, and a few further family-name stories). Those belong to the name, not to the speed of sound.
原始詞典資料5 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
Machname/mɑːk/
- 1
A surname from Czech.
- 2
Ernst Mach, Austrian physicist (1838–1916), born in Moravia (now Czech Republic).
Machnoun/mɑːk/
- 1
natural-sciencesphysical-sciencesphysicsA ratio of the speed (of an object, etc.) to the speed of sound in the fluid or other medium through which the object travels. Usually used to describe supersonic speeds; always precedes the Mach number.
- The jet traveled at Mach 3.
這個拼法也被記錄為下列字的變化形：
- microservices
- API-first
- cloud-native
- headless
- Machiavellian
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。