请看这儿:fruit - WiktionaryUsage notes- In the botanical and figurative senses, fruit is usually treated as uncountable:a bowl of fruit; eat plenty of fruit; the tree provides fruit.
- fruits is also sometimes used as the plural in the botanical sense:berries, achenes, and nuts are all fruits; the fruits of this plant split into two parts.
- When fruit is treated as uncountable in the botanical sense, a piece of fruit is often used as a singulative.
- In senses other than the botanical or figurative ones derived from the botanical sense, the plural is fruits.
- The culinary sense often does not cover true fruits that are savoury or used chiefly in savoury foods, such as tomatoes and peas. These are normally described simply as vegetables.
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