He is behind the times.他很落伍.I used to return feeling very slack and behind the times.我回来以后往往觉得泄气、跟不上时代.Their courses in physics are very much behind the times.他们的物理课程内容非常陈旧落后....

behind the times的音标：behind the times的英式发音音标为：[bi'haind ðə taɪmz]behind the times的美式发音音标为：[bɪ'haɪnd ði taɪmz]...

过时的， 落伍的，悖时，背时，不识时务...