come up

产生，发生

come out, come out of..., come out with, come over, come round, come through, come to, come to a close, come to a stop, come to an end, come to life, come to mind, come to one's mind, come to one's senses, come to realize, come to terms with, come to the point, come true, come under, come under sth, come up against, come up smiling, come up to, come up with, come upon, come upon sb., come upon sb/sth, come what may, come-back, come-down, come-hither, come-on, come-uppance, come/go into effect, come/go into force, come/go into operation, comedian, comedienne, comedy, comedy of manners,