"Not know beans about" nghĩa là gì?

Galaxy Group Stephan's Quintet. Photo courtesy HubbleColor {Zolt}
Bean là hạt đậu nhưng người Mỹ dùng beans để chỉ những vật nhỏ, lặt vặt, không đáng kể. Vì thế thành ngữ 'not know beans about something' có nghĩa là không biết gì hết về một đề tài nào đó.

Ví dụ
“This is the second season that my husband and I have been growing tomatoes, cucumbers and herbs. They’re much better tasting than what I usually find at the supermarket. At the same time, we’re supporting the environment by reducing the pollution caused by vehicles. If you don’t know beans about (không biết gì hết) what you can do to help save our planet, perhaps it’s time you found out (nên tìm hiểu).”

“When Brenda was first introduced to Jack, she was intimidated by his knowledge. When it came to his field, astrophysics (vật lý học thiên thể), she frankly didn’t know beans about it (thật sự không biết tẹo nào hết). But over several months, she fell in love with his enthusiasm for stars and galaxies (dải ngân hà). It’s amazing how much she understands now.”

VOA

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