1.register n.登记簿(a written record containing regular entries of items or details)；v.登记(to enroll one's name in a register)

例：Patients often register dissatisfaction with physicians who prescribe nothing for their ailments.

派生词:registration(n．登记；注册)

2.regressive a．（税率）递减的(decreasing in rate as the base increases)

词根记忆：re(后)+gress(走)+ive--向后走--退步的--递减的

注意：progressive(a．先进的)

例：Sales taxes tend to be regressive, affecting poor people more severely than wealthy people.

3.reign n.统治（时期）(sovereignty)

词根记忆：来自rein(v.统治)的变体

注意：regime(n．政权)

例：The most ancient Egyptian temples were constructed in the reign of Ramses ll．

4.reimburse v.偿还(to repay)

词根记忆：re(重新)+im（进入）+burse(钱包)--重新进入钱包--偿还

例：The insurance coverage(保险责任范围)does not reimburse subscribers for medical expenses incurred in a public hospital.

派生词：reimbursement(n．偿还)