If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.
Rene Descartes  ·  Doubt

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truth [trʊθ] 词频1
n. 真理;真相,事实;忠实,忠诚;现实,现实性;
💡 tru相信,真实+th抽象名词 →事实,真理
"He adjured them to tell the truth."
他要求他们讲真话。
近义:honesty, reality, reliability, sooth, substantiality, truthfulness 反义:hypocrisy, imposture, meretriciousness, phoniness, spuriousness, truthlessness
necessary ['nɛsəsɛri] 词频1 词根: necessar
adj. 必要的;强制的;必然的;不可避免的; n. 必需品;
💡 necess必要 + ary 表示有...性质的, → a.必要的;必然的
"Vitamin D is necessary to aid the absorption of calcium from food."
从食物中吸取钙需靠维生素D的帮助。
近义:indispensable, inevitable, mandatory, needful, obligatory, obliged 反义:needless, pointless, profitless, purposeless, redundant, reiterative
once [wʌns] 词频1
adv. 一次,一趟;一倍;曾经;一旦; conj. 一旦…就…;一经; n. 一次,一回;
💡 on=one一+ce次 → 一次
"Once in the bloodstream, the bacteria adhere to the surface of the red cells."
细菌一进入血液里,就附着在红细胞表面上。
近义:heretofore, occasionally, onetime, previously, sometimes, thereinbefore
doubt [daʊt] 词频1 词根: dou
n. 怀疑,疑虑;未确定; vt. 怀疑,疑惑; vi. 不确定,不能肯定或怀疑;
💡 doubt二→二种状态→怀疑
"a feeling of doubt and uncertainty"
迟疑不定的感受
近义:disbelieve, hesitation, hesitate, mistrust, question, stagger 反义:prove, reassure, verify, vouch, check, demonstrate
real ['ri:əl] 词频1 词根: 统治
adj. 真的;真实的,现实的;事实上的;真诚的; adv. 真正,实在;确实地; n. 实在,现实;实数;
"I made a real balls-up of my exams."
我考试考得一塌糊涂。
近义:legitimate, authentic, sterling, true, truthful, unfeigned 反义:imaginary, utopical, visional, chimeric, chimerical, dreamlike
least [list] 词频1
adj. 最小的;最少的( little的最高级);最不重要的,地位最低的; adv. 最少,最小; n. 最小;最少量;
"We need at least 24 hours' notice of cancellation."
如欲取消,请至少提前24小时告知。
近义:lowest, lowliest, measly, merest, minimal, minimum 反义:maximal, meridian, top, upmost, uppermost, greatest

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