以下是一些例句: The first step is to gather your materials. Firstly, let's discuss the budget. 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。 "first of all" 则通常用于引出一系列要点或步骤。
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.
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 ...
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 ...