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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 one of the first to arrive.和He is the first (= very willing) to admit that much of his success is due to his good looks. first和firstly作副词时完全同义，都可以表示“第一，首先”，都可用作句子副词，此时first也可写作first of all。 例如： First，I would like to thank everyone for coming. 首先，我要感谢各位光临。 Firstly，I would like to thank everyone who has contributed to this success. Last name 和 First name 到底哪个是名哪个是姓？ 上学的时候老师说因为英语文化中名在前，姓在后，所以Last name是姓，first name是名，假设一个中国人叫孙悟空，那么他的first nam… 显示全部 关注者 458 1 贝塞尔方程 显然，这是一个二阶齐次线性常微分方程，其解为： 其中， 为阶数， 为第一类贝塞尔函数 (Bessel functions of the first kind)， 为第二类贝塞尔函数 (Bessel functions of the second kind)，有的也记为 。 第一类贝塞尔函数积分表达式 对于整数阶n， 该公式也叫： Hansen-Bessel formula. 对于非整数阶 ，且.
“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，第一个能够治疗该疾病的药。 在NMPA的申报当中，它同样也应该属于1.1类新药。 要创建一个新的参考文献标题，请使用以下命令:1.在菜单栏“搜索”中输入关键字并搜索关键词,如"The Endnote Text"或"the first endnoting manualizations",查找有关的参考资料信息。 1080P/2K/4K分辨率，以RTX 5050为基准（25款主流游戏测试成绩取平均值） 数据来源于：TechPowerUp 桌面端显卡天梯图： At the first time：它是一个介词短语，在句子中常作时间状语，用来指在某个特定的时间点第一次发生的事情。 例如，“At the first time I met you, my heart told me that you are the one.”（第一次见到你的时候，我的心就告诉我，你就是那个人。
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