出洋相
make a fool of oneself;make sb a laughing-stock; cut a miserable figure;make a sorry spectacle(or an exhibition)of oneself;blooper;gaffe
他又一次展示了他～的才華，在歡迎講話中說：“您在17—1976年幫助我國慶祝了200周年?！?000名來賓中傳出一陣笑聲。He once again demonstrated his gift of gaffe in his speech,saying that “you helped our nation celebrate its bicentennial in 17—in 1976.”Laughter rippled through the crowd of 7000guests.