理论的基础是实践反过来理论又为实践服务: theory is based on practice and in turn serves practice
轮流: take turns; do sth. in turn; rotation; by spells 短语和例子轮流值日 be on duty in turn; 医生们轮流参加巡回医疗队。 the doctors take turns at participating in the mobile medical team.; 轮流放牧 rotational grazing; 轮
