I need a pen to write with.

我需要一支钢笔写字。

youdao

I need a pen to write with.

我需要一支笔写字。

youdao

I have a pen to write with.

我有一支可写字的钢笔。

youdao

The cap of this pen doubles as a stylus tip, giving users the option to write with ink on paper in the iNotebook device and then quickly switch over to writing with a stylus in the app.

WSJ: Pen and Paper Find a Place in the Digital World

And Livescribe has tried since 2007 to popularize its technology, which uses a pen with a tiny, built-in camera and special paper to record and wirelessly transmit text as you write.

WSJ: Pen and Paper Find a Place in the Digital World

The pen will always have a place in translating thoughts into immediate expression, providing people with a strong and effective tool to write down their story, give directions or even play games.

ENGADGET: N-trig's Digital Pencil plays pen and fingertip roles, claims mastery of both