reinforce vt.加强
The mayor reinforces the police department by hiring more cops.市长聘用了更多的警察，来加强警察局的力量。
reject vt.拒绝，抵制
He tried to join the army but was rejected because of his poor health.他想参军，但由于健康状况较差而被拒绝了。
relate vt.①叙述，讲②使联系，发生关系
Although they did not agree with the plan, they did not relate their opposition to it.虽然他们不同意这个计划，但也没有表示反对。
Some education advisers have related the drop in the standard of students' performance with the increase in the size of classes.有些教育顾问将学生成绩水平的下降与班级规模的扩大联系起来。
relax v.(使）松弛，放松
The massage relaxed her.按摩让她放松了下来。
release n./v.释放
The end of the war brought the release of the prisoners.战争结束后，囚犯们获得释放。
relevant adj.有关的，切题的
His nationality isn’t relevant to whether he’s a good lawyer.他的国籍与他是否是一位好律师无关。
reliable adj.可靠的，可信赖的
I am happy to recommend her for this position because I have always found her to be an efficient and reliable employee.我很高兴推荐她担任这个职务，因为我始终认为她是一位高效和可靠的员工。
relief n.(痛苦等的）减轻；（债务等的）免除
His relief from pain came as the medicine began to work.随着药物逐渐发挥作用，他的疼痛也得到了缓解。
relieve vt.减轻
The medicine relieved her itch.这种药物为她减轻了瘙痒。
reluctant adj.不情愿的，勉强的
She was reluctant to accept the job offer because she was not sure that she could find a baby-sitter.她并不愿意接受这个工作邀请，因为她不确定自己能否找到一位保姆。