1. He is a true cognoscente of classical music, with an extensive knowledge of composers and their works.
他是一个真正的古典音乐行家，对作曲家及其作品有广泛的了解。

2. The gallery owner relies on the opinion of cognoscenti to determine the authenticity and value of the artwork.
画廊主依靠专家的意见来确定艺术品的真实性和价值。