罗茜知识的广博程度给她的老师留下了深刻印象。

Rosie's teacher was impressed by the extent of her knowledge.

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Rosie's teacher was impressed by the extent of her knowledge.

extent 是名词,来自动词 extend(延伸、扩展),表示"范围、程度、广度"。在这里指知识的广度和深度。

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