ascertain

动词

1. 1

   查明、弄清、查出正式

   Investigators are still trying to ascertain the cause of the fire.

   调查人员仍在设法查明火灾的原因。

2. 2

   确定、确认正式

   Please ascertain whether the documents have been signed.

   请确认这些文件是否已经签署。