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Roulette is a casino game.
Roulette輪盤 is a casino game是一種賭場遊戲。
A wheel spins, a small ball runs around the rim, and then the ball falls into one of many numbered holes, red or black. Players put money on a number, a colour, or a group of numbers, and they win if they guessed right. The casino is built to win over time.
A wheel spins一個輪子會旋轉 a small ball runs around the rim一顆小球沿著邊緣滾動 and then the ball falls into one of many numbered holes, red or black然後球會落進眾多標號的洞裡的其中一個，紅色或黑色。Players put money on a number, a colour, or a group of numbers玩家把錢押在一個數字、一個顏色，或一組數字上 and they win if they guessed right猜對了就贏。The casino is built to win over time賭場的設計就是長期下來自己會贏。
People also stretch the word to any situation where you take a chance and something bad might happen — above all in Russian roulette, which is not a table game and is deadly. Though actually, when someone says “it’s a bit of a roulette” they often only mean “you cannot know how it will turn out.” The first meaning, the one on the sign above the table, is the spinning wheel.
People also stretch the word人們也會把這個詞延伸使用 to any situation where you take a chance and something bad might happen用在任何有風險、可能出事的情況上 above all in Russian roulette尤其是Russian roulette（俄羅斯輪盤） which is not a table game and is deadly那不是賭桌遊戲，而且很致命。Though actually不過其實 when someone says "it's a bit of a roulette"當有人說「這有點像roulette」 they often only mean "you cannot know how it will turn out."他們通常只是說「你無法預料結果會怎樣」。The first meaning, the one on the sign above the table, is the spinning wheel第一個意思，也就是賭桌招牌上寫的那個，才是那個旋轉的輪子。
組成Borrowed from French roulette, “little wheel.” The looser sense “a situation with a random chance of real harm” may have been taken from the phrase Russian roulette.
原始詞典資料8 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。
roulettenoun/ɹuːˈlɛt/
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A game of chance in which a small ball is made to move round rapidly on a circle divided off into numbered (usually red and black) spaces. When the ball stops, it indicates the result of a variety of wagers permitted by the game.
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An instance of risk-taking, especially when the downside exceeds the upside (contrary to the game of roulette where only the wager is lost).
- Doctors and health officials said that the WRC-TV documentary, "DPT: Vaccine Roulette," emphasized the risks of the vaccine while ignoring the dangers of the disease, which has been almost wiped out in this country.
- They would all rather take their chances with the existing policy-making roulette rather than follow process discipline.
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A small toothed wheel used by engravers to roll over a plate in order to produce rows of dots.
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A similar wheel used to roughen the surface of a plate, as in making alterations in a mezzotint.
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geometrymathematicssciencesThe locus of a point on a plane curve that rolls without slipping along another fixed plane curve.
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hobbieslifestylephilatelyAny of the small incisions on a sheet of stamps, used as an alternative to perforations.
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A cylindrical curler for the hair.
rouletteverb/ɹuːˈlɛt/
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To separate or decorate by incisions made with a small toothed wheel.
- to roulette a sheet of postage stamps
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。