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1.spectator n.觀眾：旁觀者(one who looks on or watches)
詞根記憶：spect(看)+ator--觀眾；旁觀者
例：The bleachers at the game were filled with spectators.//We mustn't stand by as a spectator.
2.specter n．幽靈(ghost)；縈繞在心頭的恐懼(phantasm)
聯想記憶：spect(看)+er--引入注目的東西--幽靈
例：The princess saw a specter in the corridor.//John was haunted by the specter of his past sins.
3.spectrum n.范圍(scope)；光譜(a continuum of color formed when a beam of white light is dispersed( as by passage through a prism) so that its component wavelengths are arranged in order)
詞根記憶：spectr(光譜)+um--光譜
例：Mary's spectrum of scientific knowledge ranged from anatomy to zoology.//The ultraviolet band of the spectrum emitted by the Sun is harmful to the human body.//X-ray spectrum X 射線譜//electromagnetic spectrum電磁波頻譜
4.speculate v.推測(to reflect, to think)；做投機買賣(to assume a business risk)
詞根記憶：specul(看)+ate--用心看--推測
例：Marine biologists speculated that clicking sounds emitted by dolphins might have another function.//The banker speculated in mutual funds.
派生詞：speculation(n．推測；投機買賣)：speculative(a．推測的)
5.speculation n.思索；推測（an act or instance of speculating）；投機(a transaction involving such speculation)
詞根記憶：來自speculate(v.思索；推測)
例：They have confirmed researchers' speculation that masses of hot rock are buoyant enough to rise to the upper part of Earth's mantle.
同根詞：suspect(v.懷疑；猜想)
6.speculator n．投機者(someone who buys or sells in expectation of profiting from market fluctuations)；思索者(someone who ponders)
詞根記憶：來自speculate(v.投機：推測)
例：In 1929 relatively small declines in the market ruined many speculators who had bought on margin; they had to sell, and their selling pushed other investors to the brink.
同根詞：speculative(a．投機的；推測的)
7.sphere n.球(globe);領域(an area or range)
聯想記憶：地球是被大氣(atmosphere)環繞著的球體(sphere)
例：armillary sphere渾天儀 //material and spiritual sphere物質領域和精神領域
同根詞：hemisphere(n．半球)；atmosphere(n．大氣層)：biosphere（n．生物圈）
8.spherical a．球的，球狀的(having the form of a sphere or of one of its segments)
詞根記憶：來自sphere(n．球體)
例：Cartographers have long struggled with the problem of how to draw the spherical Earth on a flat sheet of paper.
派生詞：spherically( ad.球地，球狀地) -
同根詞：sphericity (n．球形：球面)
9.spiced a．加香料的，加調料的(containing spice or spices)
例：The chef cooked the beef in a heavily spiced stew.
n. 期待，期望
