I will write a letter to a friend in Beijing.

我要给我北京的朋友写封信。

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I wrote a letter to a friend that she was ill.

我写信给一位朋友，说她病了。

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In a letter to a friend, he describes the discovery of la reazione nevo (the black reaction)

在一封写给朋友的信中，Golgi描述了这个方法里的黑色反应

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on his all-jazz outing, "Expressions." Fans are also treated to "Letter From A Friend."

VOA: standard.2010.04.02

Now shortly after Milton composed the sonnet "How soon hath Time," he wrote a letter to a friend in which he enclosed this poem, the sonnet.

在他创作“时间过得真快“后不久“,他给朋友写了封信，把这首十四行诗也附了进去。

耶鲁公开课 - 弥尔顿课程节选

You remember the "Letter to a Friend" that we looked at for the last time.

你们记得上节课我们读的《信朋友的一封信》吧。

耶鲁公开课 - 弥尔顿课程节选

Later, in a bombed-out Iraqi barracks, he wrote a starkly prescient letter to a Marine friend.

WSJ: For Wounded Vet, Love Pierces the Fog of War

In a letter she wrote to a friend that summer, she said Tommy had hit on her, but she wasn't interested.

CNN: Moxley Case: Who was Martha Moxley?

In August 2009, he wrote a letter to his friend Alex Acevedo, begging him to write back with news.

CNN: From Long Island to Lahore: The plot to bomb New York