a criminal case that has not been solved for a long time
長期間解決されていない犯罪事件 (chō kikan kaiketsu sarete inai hanzai jiken)
"The detective reopened a cold case from 1999."
"探偵は1999年のコールドケースを再開した。" (Tantei wa 1999 nen no **kōrudo kēsu** o saikai shita.)
to work hard on something for a long period
To skip a class without permission
kind and sympathetic
to commit an illegal act
to be in charge of an activity or organization
to be under a lot of pressure or stress
