ascertainKK [ˏæsɚˋten] /ˌæsɚˈteɪn/動詞1查明、弄清、查出正式Investigators are still trying to ascertain the cause of the fire.調查人員仍在設法查明火災的原因。2確定、確認正式Please ascertain whether the documents have been signed.請確認這些文件是否已經簽署。