Grammar Note
数字1用作形容词时，通常置于名词前，表示数量为一。
非常；很；极度
先理解核心含义，再看它在真实句子里的用法。
非常；很；极度
to a high degree; very much
This is a 1 place to visit in autumn.
这是一个绝佳的秋游地点。
达到高度。
To a high degree.
She gave a 1 performance at the concert.
她在音乐会上奉献了极致的演出。
The teacher gave a 1 explanation of the topic.
老师对这个问题做出了极好的讲解。
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数字1用作形容词时，通常置于名词前，表示数量为一。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.