GRE

sermon - n. 说教,训诫,牢骚;

serpentine - a. 蛇的,层层卷绕的,阴险的; n. 蛇纹石,古时候大炮的一种,S字曲线; v. 缓慢地流;

serrate - a. 锯齿状的;

serried - a. 密集的,林立的,重重叠叠罗列的; :: compact

servile - a. 奴隶的,奴隶根性的,卑屈的;

sever - v. 切断,脱离,分开; :: cut off separate detach disconnect part

severe - a. 严格的,凶猛的; :: stringent restrictive

shabby - adj.破旧的；蹩脚的

shackle - n. 桎梏,束缚物; v. 加桎梏,加枷锁,束缚; :: impede

shadow - n. 影像,阴暗,预兆; v. 遮蔽,使...忧沉,预示;

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