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1.relentless a.无情的(unrelenting)；不断的(steady, persistent)
词根记忆：relent(变温和)+less--不能变温和--无情的
例：relentless persecution无情的迫害
2.reliable a．可靠的，可信赖的(dependable)
词根记忆：rel(y)（信赖）+iable(能…的)--可靠的，可信赖的
例：A more reliable study has indicated that eating chocolate does not increase the likelihood of getting heart disease.
派生词：reliability(n.可靠性)；reliance(n.信赖；信任)
3.reliance n.信赖，信任(the state of being dependent on or having confidence in)
词根记忆：来自rely(v.信赖)
例：lf these trends in fuel production and usage continue, Sidurian reliance on foreign sources for fuel should decline soon.
同根词：reliant(a．信赖的)
4.relic n．文物(trace or feature surviving from a past age and serving to remind people of it)
例：The museum put the ancient relics on display.
5.relieve v.缓解：减轻(to lighten)
词根记忆：re+lieve(=lev轻)--使…轻--缓解；减轻
例：Solacium(a medicinal herb) can relieve tension and promote deep sleep.
派生词：relief(n．轻松；缓解)；reliever(n．救济者)
6.religious a．宗教的(of religion)；虔诚的(of, relating to, or devoted to religious beliefs or observances)
例：It is almost universally agreed that political virtue must rest upon moral and religious precepts.
7.relinquish v.放弃(to give up);交出(to give over possession of)
词根记忆：re(重新)+linqu(=leave离开)+ish--再次离开--放弃
例：Max relinquished his ownership of a small piece of land needed by the city.
8.reluctant a．不情愿的，勉强的(unwilling)
例：War industries during the Second World War were reluctant to hire women for factory work.
派生词：reluctance(n.勉强)
9.remainder n．【数】余数：剩余部分(a remaining group part, or trace)
词根记忆：来自remain(v.剩余)，指减法之后的余数
例：Please write the remainder as a fraction.//Mary did most of the work, and Susan finished the remainder
adj. 固执的，坚持的，连续的
