at first

at first的音标是[əˈfrist]，基本翻译是“首先，起初”，速记技巧是“at”表示时间，“first”表示第一。

At first这个词的英文词源可以追溯到拉丁语“ad”和“prius”，意思是“在之前”或“在前”。

变化形式：

1. At times，at one time，和at a time都是at first的变体形式，用来表示在某个特定时间点或阶段。

相关单词：

1. At first，我们可以用firstly来表达类似的意思，表示在讨论或论述中的第一个要点。这个词源于拉丁语的“primus”和“talius”，意为“第一点”。

2. First of all，这个词用来表示首先，也是基于拉丁语的词源。

3. Initially，这个词表示最初地，也源于拉丁语。

4. At the outset，这个词表示开始时，也是基于at first的用法。

以上这些词都可以用来表示在某个阶段或步骤的开始，强调了时间的先后顺序和逻辑关系。这些词的使用可以使论述或讨论更加有条理和清晰。

至于字数限制，我尽量在100字内解释每个词源和变化形式，以及相关的单词。希望对你有所帮助！

常用短语：

1. at first 最初，起初

例句：At first, I was nervous and unsure of myself, but I gradually gained confidence as the day went on.

2. first of all 首先

例句：First of all, we need to identify the problem before we can come up with a solution.

3. at the beginning 在开始的时候

例句：I always remember the at the beginning of my journey, I felt overwhelmed by the task ahead of me.

4. in the beginning 起初

例句：In the beginning, we had to work hard to establish our business, but now we are thriving.

5. from scratch 从头开始

例句：We decided to start from scratch and build our own website from scratch.

6. again and again 反复地

例句：She practiced her speech again and again until she felt comfortable with it.

7. time and time again 一次又一次地

例句：Time and time again, I have seen how important it is to be kind to others.

英文小作文：

When I first started driving, I found it difficult to navigate busy streets and intersections. I had to rely on maps and directions from other drivers, which made me nervous and unsure of myself. However, with practice and experience, I gradually gained confidence and became more comfortable behind the wheel.

Now, I can confidently navigate through busy streets and intersections without relying on maps or directions from other drivers. I enjoy the feeling of freedom and independence that driving brings me, and I am grateful for all the opportunities and experiences that it has given me so far. At first, it was a challenging experience, but now it is something that I look forward to every time I get behind the wheel of my car.