keyed up       
adjective [ after verb ] uk/ˌkiːd ˈʌp/ us/ˌkiːd ˈʌp/
 (通常指重要事件前)非常兴奋的,心情紧张的
very excited or nervous, usually before an important event
  He always gets keyed up about tests. 他考试前总是会感到很紧张。 
 
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