sophomoric
Longman Dictionary of Contemporary English 5++LDOCE 5++soph·o·mor·ic /ˌsɒfəˈmɒrɪk◂ $ ˌsɑːfəˈmɔːrɪk◂, -ˈmɑː-/ adjective American English formal STUPID/NOT SENSIBLEsilly, and behaving in a way that is typical of someone much younger 幼稚的；不明智的 sophomoric humor 幼稚的幽默
Examples from the Corpus
sophomoric• This has got to be one of the most embarrassing film moments of the year -- sophomoric, self-congratulatory and stupid.• a sophomoric sense of humorsoph·o·mor·ic adjectiveChineseSyllable
that in a behaving and Corpus silly, way
sophomoric
soph‧o‧mor‧ic /ˌsɒfəˈmɒrɪk◂ $ ˌsɑːfəˈmɔːrɪk◂, -ˈmɑː-/
adjective American English formal
silly, and behaving in a way that is typical of someone much younger:
sophomoric humor
soph‧o‧mor‧ic /ˌsɒfəˈmɒrɪk◂ $ ˌsɑːfəˈmɔːrɪk◂, -ˈmɑː-/
adjective American English formalsilly, and behaving in a way that is typical of someone much younger: