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A bonanza is a lucky stretch — a time, place, or chance where people can make a lot of money or have a sudden run of success. We do not use it for ordinary steady pay. A new market can be a bonanza for sellers; a film can be a box-office bonanza; a rich find in the ground was the older picture behind the word. Newspapers and business talk like it; it feels colourful, a little loud, not a quiet kitchen word. It still carries the feeling of a lucky strike, not of slow hard work.
發財良機；大豐收（生意上「賺翻了」的機會）
組成Borrowed from Spanish bonanza, which first meant a calm sea and fair weather, then good luck, then a rich mine. Spanish took it from Vulgar Latin *bonacia (a lull, a dead calm), from Latin malacia (a calm sea). People then reshaped it under Latin bonus (good), wrongly treating the opening mal- as if it came from malus (bad).
原始詞典資料4 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。
Bonanzaname
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A city in Klamath County, Oregon, United States.
bonanzanoun/bəˈnæn.zə/
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businessminingA rich mine or vein of silver or gold.
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The point at which two mother lodes intersect.
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Anything which is a great source of wealth or yields a large income or return.
- The popular show quickly became a ratings bonanza for the network.
- For two decades the bonanza on Scotland’s west coast continued. An occupation that had been seasonal and modestly profitable became year-round and lucrative. Baskets of herring put televisions into fishermen’s cottages and cars outside their doors. But fish, like oil and gas, with which Scotland’s continental shelf is also well-endowed, are not in unlimited supply.
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。