problem child

child who continually behaves badly, does not learn well, etc 有问题的儿童（一贯行为不端、 功课不佳等的）.

pro, pro forma, pro forma (also pro forma invoice), pro or con, pro rata, pro tem, pro-, probability, probable, probably, probate, probation, probation officer, probationary, probationer, probe, probing, probingly, probity, problem, problematic, problematically, proboscis, procedural, procedure, proceed, proceeding, proceedings, proceeds, process, processing, procession, processional, processor, proclaim, proclamation, proclivity, procrastinate, procrastination, procrastinator,