饱经沧桑: having lived through many changes...
牌照: (business) license, vehicle license, car registration, license plate...
诊所: clinic...
月票: monthly ticket...
不见得: not necessarily, not likely...
助理: assistant...
内需: domestic demand...
外文: foreign language (written)...
一干二净: thoroughly (idiom), completely, one and all, very clean...
海鲜: seafood...
