1.skeptical a．懷疑的(suspicious)
例：The tone of the passage was skeptical and questioning.
派生詞：skepticism(n．懷疑論)；skeptics(n.懷疑論者；無神論者)
2.sketch n．草圖，素描(draft);v.畫速寫
例：field sketch作業草圖，現場草圖
派生詞：sketchy(a．粗略的)
3.skull n．頭骨(the skeleton of the head)
聯想記憶：據說大腦殼(skull)的人掌握技能(skill)比較快
例：The skulls, pelvises（骨盆）and hind feet of pterosaurs（翼龍）are reptilian.
4.slam v.猛烈撞擊(to knock)；砰地關上（to shut noisily）
發音記憶：“死拉門”--使勁關--砰地關上
例：The colossal object from space cut through the atmosphere and slammed into Earth.
5.slice n．薄片，切片(a thin flat piece cut from something)；部分(portion, share)
記：和sly（a．狡猾的）一起記
例:Mary put a slice of ham on her sandwich.//Taxes take a large slice of my income.
6.slick a．光滑的(slippery)；聰明的(clever)
例：The roads are slick with ice tonight.//Everyone laughed at John's slick response to Dave's insult.
7.slight a．少量的(thin)；微不足道的(trivial)
聯想記憶：s+light(輕的)--輕微的—微不足道的
例：Products with slight manufacturing defects may hinder their sales.//The documentation of this epidemic was slight.
派生詞：slightly( ad.少量地)
8.slip n.紙片(a small piece of paper);差錯(error);v.滑行(to slide);下降(to decline)
注意：slipper(n．拖鞋)
例：There were ten numbers written on a slip of blank paper.//Corporate profits slipped severely during the recession.
9.slope n．斜坡(ramp);【數】斜率(The rate at which an ordinate of a point of a line on a coordinate plane changes with respect to a change in the abscissa.)
例：continental slope大陸坡