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the first to do为什么要用to do？
first 有多种词性，其中就有名词，剑桥词典对作名词的first的定义是：the first person or thing to do or be something, or the first person or thing mentioned，例句有： [ + to infinitive ] She was
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first given name和second given name是什么意思，能用中文举例
first name (given name): A given name is a person's first name, which they are given at birth in addition to their surname. [formal] eg: In many Western countries, people have first names
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First-in-Class、首创药物、原创新药、原研药，是什么关系？
“First in Class”，顾名思义，也就是首创新药。 根据FDA定义，被授予First-in-class的药物是指使用全新的、独特的作用机制来治疗某种疾病的药物。 它是一种彻底创新的方法，第一个能够治
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first和firstly以及first of all有什么区别?
First of all, we need to identify the problem. 在大多数情况下，"first" 和 "firstly" 可以互换使用，但 "firstly" 通常用于强调某件事是最重要的。
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