“老弟”的拼音为：lǎo dì...

你不该这么说，老弟！It's not for you to say so, my man!我的老弟，欢迎你留下来。My dear man, you are welcome to stay.握个手，老弟，祝贺你！Put it there, Pal, put it there!...

“老弟”的英语可以翻译为：young man，young fellow，my boy ...