keep up

保持，维持；继续进行，坚持

keep one's head, keep one's mind on, keep one's temper, keep one's word, keep oneself/sb from sth/doing sth, keep out, keep out of, keep pace with, keep sb in, keep sb under, keep silence, keep sth back, keep sth. secret, keep sth.(sb.)+adj., keep terms with sb., keep to, keep to oneself, keep to sth, keep track, keep under, keep up with, keep...from, keep...in mind, keep/hold pace with, keeper, keeping, keepsake, keg, keg beer, kelp, kelvin, ken, kennel, kepi, kept, kept woman, kerb (also esp US curb), kerb drill, kerb-crawling, kerbstone,