I am writing to you in connection with your recent job application.

我写此信与你最近求职一事有关。

《牛津词典》

I am writing an article I hope I can sell.

我正在写一篇我希望会有销路的文章。

youdao

I am writing in reply to your letter of 16 March.

3月16日来函收悉，现答复如下。

《牛津词典》

What I do is I always know who I am writing for, I always know the ensemble or the soloist.

VOA: special.2010.07.12

Everything inside of the curly braces is the code I am writing.

所有在大括号里面的代码都由我们自己编写。

哈佛公开课 - 计算机科学课程节选

Well, for a thing called main which itself is a function but a function I wrote, a tool I am writing at the moment not like printf which someone else wrote long ago, I have to say where does main start, where does main end, and I do that by using these curly braces.

至于这个名曰main的函数,由我们自己写的函数，也是一个工具,只不过由我们自己编写，而不是像printf那样已经由前人写好了,我们必须要说明main在哪开始，在哪结束，这样我们就要用到大括号了。

哈佛公开课 - 计算机科学课程节选

In addition, I am writing my first novel and working on two other books.

FORBES: The Good Enough Guide To Work-Life Balance

And given what I thought about it before, I can hardly believe I am writing that.

FORBES: Chelation Therapy: What To Do With Inconvenient Evidence

This moment taught me something about Hollywood and is why I am writing this article.

FORBES: George Lucas and The Problem With Hollywood