She was bent over her desk writing a letter.

她正伏案写信。

《牛津词典》

I was supposed to be writing a letter but I'm afraid I got sidetracked.

我本来应该在写信，但后来恐怕是分心干别的去了。

《牛津词典》

She expressed her disgust at the programme by writing a letter of complaint.

她写了封投诉信，表示对这个节目的反感。

《牛津词典》

I was able to do letter writing, I was able to do data collection, and do a product there.

我以前上书信写作的课，要上数据搜集的课，还要上美工课。

麻省理工公开课 - 媒体、教育、市场课程节选

I'm thinking of the writing life one might have whenever we write a letter these days.

我所说的写作，也包括,现代生活中的写信。

普林斯顿公开课 - 人性课程节选

I think it's in part that, suffering from lupus, she was very much confined to her house in Georgia, and the letter writing, this kind of correspondence, was certainly a way for her to keep in contact with the world of readers and other writers and friends.

我想这多少与她，受病痛的折磨有关，受制于病情，她只能呆在,乔治亚州的家里，足不出户，所以写信，必然是她和读者、,其他作家和朋友联系的方式。

耶鲁公开课 - 1945年后的美国小说课程节选

Some people choose how to concern the society by writing a letter to the paper.

CNN: Interview with Jack Neo

Disturbed about the conversation, Noh immediately started writing a letter to her sister, a college student who was often depressed.

CNN: Push to achieve tied to suicide in Asian-American women

But, Chairman Dan Burton of Indiana noted, that didn't stop former DNC Chairman Don Fowler from writing a letter on Chung's behalf.

CNN: AllPolitics - House Panel Probes Controversial Democratic Donor