If you exude love, confidence, pain, etc., you show that you have a lot of that feeling.

She just exudes confidence. 她显得信心十足。

to produce a smell or liquid substance from inside

Some trees exude from their bark a sap that repels insect parasites. 一些树的树皮会分泌出一种汁液来驱除寄生在树上的昆虫。