為何如何？你疑問的當下就是科學的開端。

Science begins when you ask why and how.

Source: Tatoeba

Sentence Composition

1 為何 wèihé why
2 如何 rúhé
  1. how
  2. what way
  3. what
=3 你 nǐ you (informal, as opposed to courteous 您 nín)
=3 你 nǐ you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)
4 疑問 yíwèn
  1. question
  2. interrogation
  3. doubt
5 的當 dídàng appropriate; suitable; fitting; proper
6 下 xià
  1. down
  2. downwards
  3. below
  4. lower
  5. later
  6. next (week etc)
  7. second (of two parts)
  8. to decline
  9. to go down
  10. to arrive at (a decision, conclusion etc)
  11. measure word to show the frequency of an action
7 就是 jiùshì
  1. exactly; precisely
  2. only; simply; just
  3. (used correlatively with 也 yě) even; even if
8 科學 kēxué
  1. science
  2. scientific knowledge
  3. scientific
  4. rational

classifiers: 門, 個, 種
=9 的 de
  1. of; ~'s (possessive particle)
  2. (used after an attribute when it modifies a noun)
  3. (used at the end of a declarative sentence for emphasis)
  4. (used after a noun, verb or adjective to form a nominal expression, as in 皮革的 pígéde "one made of leather" or 跑堂兒的 pǎotángrde "a waiter (literally, one who runs back and forth in a restaurant)" or 新的 xīnde "new one")
  5. also pr. dì or di in poetry and songs
=9 的 dī a taxi; a cab (abbr. for 的士 dīshì)
=9 的 dí really and truly
=9 的 dì (bound form) bull's-eye; target
10 開端 kāiduān
  1. start
  2. beginning