to clean or improve something; to review or practice
清理或改进某事; 回顾或练习 (qingli huo gaijin mou shi; huigu huo lianxi)
"He brushed up his teeth quickly before leaving for work."
"他快速刷牙，之后去上班。" (ta kuaisu shua ya, zhihou qu shangban)
to fix a relationship after a disagreement
to investigate or examine something carefully
to seem likely to happen soon
to find a way to overcome a problem or restriction
to think carefully about what went wrong and learn from it
to connect different economies via trade or investment
