pal(搭档,和狗也可以),good friend(直面,好朋友),teammate(队友),man(哥们,就像what's up,man?) ,true friend(患难见真情的朋友),。。。好多,但美国把朋友的范围扩大:friend包括:close childhood friend,best friend,new friend,family friend, classmate,teammate,colleague or co-worker, roommate or housemate, girlfriend or boyfriend, acquaintance.呵呵,就这些了。