Police are trying to ascertain the facts of the case.
We need to ascertain whether the project is feasible.
The police have ascertained that he knew the victim.
This much could easily be ascertained from the newspapers.
Experts were unable to ascertain the cause of the accident.
英语词典包含67175条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。