上角杰西五有什么:not since last summer 什么意思?

not since last summer 什么意思? not since last summer 什么意思? last but not least I (not see)him since 1995. the film has opened since last Monday. 怎么翻译？ 翻译：his business establishment is since last 50 years last but not the least是什么意思？ last night Tim ....his homework.(not do) I____(not see)you since I ____(leave)Shanghai. 1.I___(not see)you since I___(leave)Shanghai.