They performed, impromptu, the song My Yiddishe Momme.他们即兴演唱了歌曲《我的意第绪语妈妈》。Yiddish is a dialect of German with a mixture of Polish and Hebrew added.意第绪语是一种德语方言,还混合了一点波兰语和希伯来语。I couldn't read or understand a word of Yiddish, so I asked him to translate.我根本不懂意第绪语,所以请他来翻译。