to make a judgement about sth, especially people’s feelings or attitudes 判定，判断（尤指人的感情或态度）
~ sth
They interviewed employees to gauge their reaction to the changes.
他们与雇员面谈以判定他们的应变能力。
He tried to gauge her mood.
他试图揣摩她的心情。
~ whether, how, etc.…
It was difficult to gauge whether she was angry or not.
很难判断她是否在生气。