standing up is stand up's Present Participle

stand up

US 
UK 
  • na.起立;持久;露头角;〔美俚〕背约
  • Web站起来;站着;站立着
Simple Present:stands up  Present Participle:standing up  Past Tense:stood up  
na.
1.
站起来,起立;持久;露头角;〔美俚〕背约