核心畫面
You can picture 'commercial' as the word that tags anything with the world of buying and selling. At its centre is the marketplace; from there it stretches to whether something can make money, to things churned out in bulk to be sold, to the put-down 'only in it for the money', to stations that live off ads — and as a noun, to the ad itself.
可以想成：commercial 就是替東西貼上「買賣世界」這張標籤的字。中心是那個做生意的市場；從這裡延伸到「能不能…更多收起
可以想成：commercial 就是替東西貼上「買賣世界」這張標籤的字。中心是那個做生意的市場；從這裡延伸到「能不能賺錢」、延伸到「為了賣而大量生產」、延伸到帶貶意的「只為撈錢」、延伸到靠廣告維生的電台電視——當名詞時，更直接縮成那段「廣告」本身。原始詞典資料7 筆記錄
以下是外部詞典記錄的用法，原文照列，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。
commercialnoun/kəˈmɜː.ʃəl/
- 1
An advertisement in a common media format, usually radio or television.
- She was in a commercial for breakfast cereal.
- 2
businessfinanceA commercial trader, as opposed to an individual speculator.
- 3
obsoleteA commercial traveller.
- I have more than once had to lend a commercial money to pay his fare home; as he had played shell-out and lost the lot.
- Five persons went to the house after the milkman was gone, and that there Arab party was safe inside, — three of them was commercials, that I know, because afterwards they came to me.
- 4
slangA male prostitute.
- Tom said that homosexuals hate “commercials,” male prostitutes, and if the homosexual was drunk and angry, he might have committed murder.
- With the commercials there is no intensity of feeling and no later animosity; there is emotional and sexual fakery, but no prolonged post-sexual bargaining. […] Paradoxically these boys dissociate themselves from the commercials, yet engage in prostitution only when they require the money.
commercialadj/kəˈmɜː.ʃəl/
- 1
Of or pertaining to commerce.
- A two minutes' walk brought Warwick--the name he had registered under, and as we shall call him--to the market-house, the central feature of Patesville, from both the commercial and the picturesque points of view.
- 2
aeronauticsaerospaceaviationDesignating an airport that serves passenger and/or cargo flights.
- 3
aeronauticsaerospaceaviationDesignating such an airplane flight.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。