Learning to 2018/2/3
severe - several adj. 严重的；严厉的；严酷的；剧烈的 suspension n. 悬浮；暂停；停职 rub - rob v. 抚摸；擦；擦破 n. 摩擦；障碍；磨损处 trunk n. 树干；象鼻；（人）躯干；大衣箱；主体 principal - premiere violation n.违反，违背，妨碍；侵害；[体]违例，强奸 squadron n. 一群，空军中队，骑兵中队； v. 把...编成中队