As is so often pointed out, knowledge is a two-edged weapon which can be used equally for good or evil.
正像人們常常指出的，知識是一把雙刃刀，可以用于造福，也可以用來為害。
新概念英語第四冊
Lesson 22 Knowledge and progress
?? 句中詞匯解析
從本句中提取的重要詞匯
adj. 尖的，尖銳的;嚴厲的，直截了當的;突出的;顯然的;
v. “point”的過去式和過去分詞;
?? point點，變尖+ed形容詞后綴 →尖的，成尖狀的
"She pointed the gun at him and—bam!"
她把槍對著他，然后就是乓的一聲。
近義：jagged, peaked, pronged, sharp, spiky, tapering
反義：obtuse, pointless, dull
n. 了解，理解;知識（表示多方面的知識時有復數knowledges這一用法）;學科;見聞;
?? know知道+ledge框架 → 知識
"She has acquired a good knowledge of English."
她英語已經學得很好。
近義：idea, learning, notion, background, sageness, sapience
反義：nescience, philistinism, unacquaintance, unawareness, unfamiliarity, benightedness
adv. 相等地;平等地;公正地;平均;
?? equ 相等 + ally ...地 → adv. 同樣地；相等地
"Diet and exercise are equally important."
飲食和鍛煉同樣重要。
近義：likewise, similarly, too, alike, equitably, evenly
反義：unequally, disproportionately
adj. 邪惡的，罪惡的;有害的;不幸的，不吉的;品行壞的;
n. 邪惡，罪惡;壞事，惡行;邪惡的力量、勢力或化身;災禍;
?? e 加強或引申意義、使…+vil =base （卑劣的） → n.邪惡；禍害 a.壞的
"the evil effects of racism"
種族主義的惡劣影響
近義：ill, infirmity, malady, complaint, affection, disease
反義：goodness, humane, kind, kindhearted, kindly, loyal
adv. 常常;經常;時常;再三;
?? 十(ten)有八九的(of)， 經常的
"Sleep has often been thought of as being in some way analogous to death."
人們常常認為睡眠在某種意義上來說類似死亡。
近義：manyfold, oft, oftentimes, repeatedly, usually, offtimes
反義：infrequently, occasionally, seldom, sometimes