求详细解答first与firstly这两个词的用法以及意义区别如题目不胜感激!

求详细解答first与firstly这两个词的用法以及意义区别如题目不胜感激! and then与first 联用还是与firstly 联用?first we.and then.firstly,.and then. first of all,first,at first,和firstly的区别快 求求求 first和firstly的用法? 英语句首用First还是Firstly? would swim first,firstly选能个? first与firstly在写文章列举观点时有什么不同? 英语单词 first 与 firstly 的区别.从用法等方面来说明.最好有例句. first,at first,first of all,firstly之间的区别 at first /first/ in first / firstly的差异? 英语作文连接用first 还是firstly 急.如题还有这2个单词区别. first,firstly都是副词时有不同吗 求英语短文,两事物相同点和不同点的对比.结构类似于：XXX and XXX have something in common. firstly. secondly...thirdly... there are some differences between them. first..second...最好是某英语考试中听力或阅读原文 求详细解答这道物理题 这题怎么做 ?求详细解答 化学题,求详细解答! 数学题,求详细解答. 求详细解答 重赏