in session

在开会；在开庭

in practice, in private, in proportion (to), in proportion to, in public, in pursuit of, in quantity, in question, in reality, in regard to, in relation to, in respect that, in return, in return for, in school, in search of, in season, in secret, in sequence, in series, in shape, in short, in sight, in situ, in so far as, in some respects, in some ways, in spite of, in step, in stock, in succession, in such a way as to do, in sum, in support of, in tears, in terms of, in that, in the air, in the case of, in the common interest of,