one-trick pony
名词 n.
英文释义
名词 n.
- A performing animal (especially a pony) that knows only one trick.
-
A person or group noteworthy for only a single achievement, skill, or characteristic.
— He's a one-trick pony / One trick is all that horse can do / He does one trick only / It's the principal source of his revenue
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数据来源: Wiktionary