My essential writing tool: a text editor.

我必备的写作工具：一个文本编辑器。

youdao

Writing is a good tool for expressing feelings.

写作是表达情感的一种好方法。

《柯林斯英汉双解大词典》

If I'm confident I can do this, then I'm a lot more likely to spend time writing a better tool, since I know I won't have to write it again later for another platform.

如果我确信自己能够这样做，那么我更有可能花费时间来编写一个更好的工具，因为我知道今后不必针对另一个平台重新编写它。

youdao

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

The best writing tool I ever got was a computer.

CNN: An effusion on email

After 10 years of research and two years of writing we have created a very useful tool for entrepreneurs and investors.

FORBES: Nail It then Scale It

How do you go about writing playscripts and using them as a strategic tool?

FORBES: Magazine Article