páng​tīng

to sit in on a class

旁听 旁聽 páng​tīng
to sit in on a class verb
to audit a course; to attend a class as an unofficial student
to audit
to sit in on proceedings; to attend a meeting or a trial as an observer without the right to speak or vote
to be distracted
(literary, usually in the negative) to hear other sounds; to be distracted by sounds from the side while focusing on something else

Frequency

Movie subtitles
1.76 per million appears in 1% of films
Written text
3.70 per million

Sources