ace

Compared meaning: excellent, of very high quality (adjective).

比较义项：形容人或物非常优秀、上等（形容词）。

• ace 本词

  Informal, mainly British English; praises a person's outstanding skill or performance, usually placed directly before a noun, and not used for material objects.

  非正式说法，主要用于英式英语；用来称赞某人技艺或表现出色，常直接放在球员、飞行员等名词前构成搭配，不用来形容物品。

  He's an ace mechanic who can fix any car problem.

  他是个 ace 技师，什么车的毛病都能修好。

• choice

  More formal, often written; describes material things—especially food or goods—as being of very high quality, typically placed directly before a noun, and rarely applied to people.

  更正式，常用于书面语；用来形容食材、货物等物品品质优良，常直接放在名词前构成搭配，很少用来形容人。

  The butcher only sells choice cuts of prime beef to loyal customers.

  这位屠夫只把顶级牛肉里 choice 等级的肉块卖给老顾客。

Ace and choice mean very high quality. Ace is informal, mainly British, praising a person's skill; not for objects. Choice is more formal, describing food or goods as high quality; rarely for people. The playing-card ace and choice as a selection are not compared.

这两个词都可以表示“非常优秀”，但语域和搭配不同：ace 是非正式说法，主要用于英式英语，多用来称赞人的技艺或表现，常放在名词前构成搭配；choice 更正式，常见于书面语，多用来形容食材、货物等物品的品质，很少用来形容人。这里不比较 ace 作名词（扑克牌的“A”、网球中的“发球得分”）或动词（“顺利通过、考得很好”）的用法，也不比较 choice 作名词“选择”的用法。