Discovering the Need for Vitamins

• 作者: 孙华龙
• 来源期刊: 语言教育
• 学科: 教育
• 关键词: vitamin accident EXPLAIN ALIVE PASSAGE LATIN mother things worse harmful
• 年，卷（期）: yyjy_1991,（2）
• 页码范围: 37-
• 页数: -36页
• 分类号: G6

摘要

<正> In science, many important discoveries are made by accident.In this passage, we first explain what vitamins are.Then we explain how they were discovered. Latin was the language used by the Romans. InLatin, 'vita' means 'life'. Vitamins are chemicalswhich are necessary to keep us alive. Each type offood contains at least one useful vitamin. For