低声呢喃 meaning in English

almost a whisper
speak low
that whispers

" going into that world seems like a long time ago , but , strangely feels like it was yesterday . . . " miaka gave a small mutter . " i was in the middle of 9th grade exams , i opened the universe of the four gods in the library and when i went inside what was taka . . . no . . . tamahome doing ?
“在那个世界发生的事，似乎是很久以前了吧，但是，很奇怪呢，总觉得就像昨天发生的一样… … ”美朱低声呢喃： “当时，我正在准备国中会考，我在图书馆，翻开了《四神天地书》，然后，当我进入那个世界时，魏… …不对… …鬼宿在做什么呢？ ”