(straight) from the horse's mouth
from someone who has the facts.
“Are you sure she's leaving?” “Definitely, I heard it straight from the horse's mouth.”
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。