royal adj.王室的，皇家的
The brave knight was honored with an invitation to the royal castle.那位勇敢的骑士很荣幸地获得了进人皇家城堡的邀请函。
rub v.擦，摩擦
Rub your hands to warm them.搓一搓，让手暖和起来。
ruin v.破坏，毁灭
There was a flash flood，and the dam was ruined.洪水爆发，冲毁了大坝。
rumor n.流言，谣言，传闻
The rumor spread that a new school would be built here.有传言说这里将建一所新学校。
rural adj.农村的，乡下的，田园的
Tired of the big city, the writer moved to a quiet rural town.那位作家厌倦了大城市的生活，于是搬到了一个宁静的乡村小镇上去。
sack n.(一)袋；麻袋
Clutched in the guard's hands was a sack full of rubbish.保安手里抓着的是一个装满垃圾的麻袋。
sacrifice n./v.牺牲，献身
He sacrificed his life trying to save the children from the burning house.为了从着火的舟子里救出孩子们，他牺牲了自己的生命。
saddle n.鞍子，马鞍
Anne put the saddle on the horse’s back and rode away.安妮把马鞍放在马背上，然后骑上马走了。
sail n.帆；蓬 v.航行
Sails were traditionally made of canvas, but now they are usually made of synthetic material.传统的船帆是用帆布制成的，但现在则通常用合成材料制成。
As the ship sailed by，everyone on deck waved.当船驶过的时候，平板上的所有人都挥手致意。
sample n.范例，样品
There was a free sample of shampoo attached to the front of the magazine.杂志封面上附有一份免费的洗发水小样。