We spent a lot of time going around to mental health clinics and sitting in on professional communicators.
Hello, what does "sit in on someone" mean? I just found an explanation for sit in on something, but not "on people". Thanks!
It is not usual to "sit in on" a person. I suppose it must mean to attend their meetings/discussions/etc. as a visitor.
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It is not usual to "sit in on" a person. I suppose it must mean to attend their meetings/discussions/etc. as a visitor.