Unit 14 strip stripe strive stroke stroll structure stumble sturdy style subjective submerge submit subordinate subscribe subsequent substance substantial substitute subtle subtract successive sue suffice sufficient suggestion suicide summarize summ...
Unit 13 screen script seal secondary secure security segment segregate select senior sensation sensible sensitive sequence series session settlement severe shallow shave shed sheer shelter shield shift shiver shock shortage shortly shove shrewd shri...
Unit 12 rectify recur recycle redundant reel refer reference refine reflect reform refrain refresh refreshment refund refusal refute regarding regardless region register regret regulate reign reinforce reject relate relax release relevant reliable r...
Unit 11 preparation prescribe presence preserve preside pressure prestige presumably presume prevail prevalent previous prey primary prime primitive principle prior priority privacy private privilege probability probable probe procedure proceed proc...
Unit 10 opt optimistic option optional orbit orderly organization orient oriental orientation origin original originate ornament orthodox outbreak outcome outfit outline outlook output outrage outset outstanding overall overcome overflow overhear ov...
lounge loyal loyalty lump lure luxury magic magnetic magnificent magnify magnitude maintain malignant management manifest manipulate manner manual manufacture manuscript margin marginal mask mass massacre massive masterpiece mate mature maximum mean...
someone pron. 某一个人 something pron. 某事；某物 sometimes ad. 有时 somewhere ad. 在某处 son n. 儿子 song n. 歌唱；歌曲 soon ad. 不久，很快，一会儿 sorrow n. 悲伤，悲痛 sorry a. 对不起，抱歉；难过的 sort v...
pepper n. 胡椒粉 per prep. 每，每一 percent n. 百分之... percentage n. 百分率 perfect a. 完美的，极好的 perform v. 表演，履行；行动 performance n. 演出，表演 performer n. 表演者，执行者 perhaps ad. 可能，或 ...
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