translation.en: The mysterious noise that Penzias and Wilson were listening to turned out to be the oldest and most significant sound It was cosmic radiation left over from the very birth of the universe.
translation.zh: 聆听的神秘噪音 成了人们听到过的 最古老最重要的声音。 它是宇宙诞生之时 遗留下来的宇宙辐射。