Charles wondered if he was becoming a dirty old man.查尔斯怀疑自己是不是变成一个老色鬼了。She was followed through the park by some dirty old man in a raincoat.她在公园里一路被一个身穿雨衣的老色鬼跟着。One of the school doctors was a dirty old man who always wanted to examine the girls.其中有个校医是老色鬼，老是想给女孩子做检查。