1.test every ten day2.periodic deadline
1.to skip school2.to cut class
1.tax levied on a conquered people by an army2.fee for a divination session3.variant of 氪金[kè jīn], in-app purchase (gaming)
(coll.) to sit in on a class
1.individual lesson2.one-on-one class
1.tutorial2.period of tuition for one or two students
1.introductory course2.primer