宇宙的實際大小至今無人知道。

To date nobody knows the actual size of the cosmos.

Source: Tatoeba

Sentence Composition

1 宇宙 yǔzhòu universe; cosmos; space
=2 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 跑堂儿的 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
=2 的 dī a taxi; a cab (abbr. for 的士 dīshì)
=2 的 dí really and truly
=2 的 dì (bound form) bull's-eye; target
3 實際 shíjì
  1. reality
  2. practice
  3. practical
  4. realistic
  5. real
  6. actual
4 大小 dàxiǎo
  1. large and small
  2. size
  3. adults and children
  4. consideration of seniority
  5. at any rate
5 至今 zhìjīn
  1. so far
  2. to this day
  3. until now
6 無人 wúrén
  1. unmanned
  2. uninhabited
7 知道 zhīdào
  1. to know; to become aware of
  2. also pr. zhīdao