pal
单词辨析：
指见面点头的熟人，但还不是朋友。
She is not my friend, just an acquaintance.
她不是我的朋友，只是一个熟人。
His acquaintances are many, but his friends are few.
他的熟人不少，朋友却没几个。
指可倾诉衷肠、忠诚可靠之人。
He is my confidant.
他是我的知己。
The middle-aged woman regarded the boy as her confidant.
这个中年女人把那个男孩当作心腹朋友。
confidante 指女性知己、密友。
普通用词，多用于口语，尤指特别要好的朋友。
He is my pal at school.
他是我学校里的密友。
We've been pals since childhood.
我们打小就是好伙伴。
相关例句：
Looks like your old pal got a new job.
看起来你的老朋友有份儿新工作了。
Dear Tony, This was you takes the pen pal to accompany me the3rd year.
亲爱的Tony这是你作为笔友陪伴我的第3个年头了。
My Australian pen pal, Bruce, whom I have mentioned before, is coming to Shijiazhuang!
我曾向你提起过的澳大利亚笔友布鲁斯，要来石家庄了！
I would very much like to have a pen pal from Beijing.
我非常需要一位来自北京的笔友。
I mentioned my new pal Joey to him.
我跟他提了我的新朋友乔伊一次。
She her pen pal yesterday.
他昨天收到了他笔友的信。