| 释义 |
be up on be up on (something)To have the most current knowledge about a particular subject or issue; to be up to date on (something). Make sure you're up on this account before our meeting tomorrow morning. I'm not too up on the policy changes happening this year—is there a reference guide I can consult?See also: on, upbe up on be well informed about a matter or subject.See also: on, up |