例句：
The new librarian is a friend of mine.
這位新來的圖書管理員是我的朋友。
He's more than a coach, he's a friend.
他不只是個教練，還是個朋友。
We met at the home of a mutual friend.
我們在彼此都認識的朋友家中會面。
I walked across Scotland with a friend.
我和一個朋友徒步穿越了蘇格蘭。
Mercifully, a friend came to the rescue.
很幸運，一個朋友趕來解救了。