These pianos are of different widths.

这些钢琴的宽度是不一样的。

《新英汉大辞典》

He buys two pianos.

他买了两台钢琴。

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Her father sold pianos and both her parents were respected piano teachers.

她的父亲售卖钢琴，她的父母都是受人尊敬的钢琴老师。

youdao

"The image of the limousines that became grand pianos stuck with me, " Adams says.

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But if someone drops seven more pianos on you, it doesn't hurt seven times as much.

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The firm that he took charge of in 1950 made pianos, mouth-organs and wind-up gramophones.

ECONOMIST: Genichi Kawakami