1.sugarcane n．甘蔗(a stout tall perennial grass grows as a source of sugar)
词根记忆：sugar(糖)+cane(藤条，茎)--糖条--甘蔗
例：Many small sugarcane growers joined together to form an association-of sugarcane producers and began to buy supplies at low group rates.
2.sulfuric a．硫磺的；含多量硫磺的(of, relating to, or containing sulfur especially with a higher valence than sulfurous compounds)
词根记忆：来自sulfur(n．硫磺)
例：Acid rain and snow result from the chemical reactions between industrial emissions of sulfur dioxide and nitrogen oxides and atmospheric water vapor to produce highly corrosive sulfuric and nitric acids.
3.summit n．峰顶(peak)；最高级会议(a conference of highest-level officials)
例：The climbers placed their country's flag at the mountain's summit.//The president met with his advisors at a secret summit.
4.superb a．上乘的，极好的( splendid)
词根记忆：super(上等，超越)+b--上乘的，极好的
例：The critic praised the superb movie highly.
5.superficial a．肤浅的(shallow)；粗略的(rough)
词根记忆：super(上面)+fic(做)+ia--在上面做，表面上的--肤浅的
例：The study was either infrequent or superficial, or both.// a superficial reading粗读
派生词：superficiality(n．浅薄)
6.superior a．(to)较好的(better)；n．上级，长官(a person who is above another in rank, station, or office)
词根记忆：super(上面)+ior--在人之上的人--上级
例：Our products are superior to that of our competitors.//The soldier saluted his superior
派生词：superiority（n．优越；优势）
7.superiority n．优越（感）（the quality or state of being superior)
词根记忆：来自superior(a．优越的)
例：In contrast, the soft-sell approach involves the use of advertising claims that imply superiority more subtly.
同根词：superstratum(n.上层)
8.supernova n.【天】超新尉the explosion of a star in which the star may reach a maxi-mum intrinsic luminosity one billion times that of the sun)
词根记忆：super(超)+nova(新星)--超新星
例：Supernovas can produce clouds of high energy particles called cosmic rays.
9.supersede v.替代，取代(to replace)
词根记忆：super(上面)+sede(尘)--坐在别人的位置上--取代
例：The state law would supersede the local antismoking ordinances.