-(理屈词穷,无话可说)beagapeandtongue-tied;beatalossforwords;bestumpedby...;beunabletofindanythingtosay;gapingandspeechless;loseone'stongue;One'stongueglueditselftotheroofofone'smouth.;One'stonguerefusedtomove.;openthemouthandholdthetongue--cannotanswer;tongue-tied:
Hewasstumpedbythequestionsandremainedtongue-tiedforagoodwhile.他被问得张口结舌,半天说不出话来。
Broughtbeforetheevidenceofhiscrimes,hewasawe-struckandcouldsaynothinginhisdefence.罪证俱在,他张口结舌,无言以对。
-(惊异得说不出话来)gapewithastonishment[wonder];gapingatwithwonder