pal
US
UK pal n: informal, often plural (friend, buddy)
SC 老友 lǎo yǒu
SC 兄弟 lǎo yǒu，xiōng dì
TC 兄弟
TC 兄弟
Adrian is meeting his pals at the pub.
阿德里安正在酒吧里和兄弟们聚会。
pal n: informal (term of address: friend)
SC 朋友 péng yǒu
TC 朋友
TC 朋友
SC 伙计 péng yǒu，huǒ jì
TC 夥計 / 伙計
TC 夥計 / 伙計
Hey, George! How're you doing, pal?
你好啊，乔治！伙计，最近怎么样？
bosom buddy, bosom chum, bosom pal n: US, informal (close friend)
SC 密友 mì yǒu
The girls were bosom buddies until they both got a crush on the same boy.
pen pal, pen-pal, penpal, also UK: penfriend, pen-friend, pen friend n: (friend with whom one corresponds)
SC 笔友 bǐ yǒu
When I was a child, I had a penpal in Mexico to whom I wrote letters.
当我还是个孩子的时候，我有个住在墨西哥可以书信往来的笔友。