患难之交的英语:companion in adversity [misfortune]; a friend who went through difficult times together with someone; fellow victim(s); friendship made during adversity; friendship cemented in adversity; ...
患难之交的法语:ami fidèle dans l'épreuve;ami à toute épreuve;amitié;partagée dans l'adversité
患难之交的俄语:[huànnànzhī jiāo] дружба, проверенная в беде; испытанный друг