那是人类第一次在月球上行走。

That was the first time that a man walked on the moon.

Source: Tatoeba

Sentence Composition

=1 那是 nàshi
  1. (coll.) of course
  2. naturally
  3. indeed
=1 那是 nàshì
  1. (colloquial) of course
  2. of course
2 人类 rénlèi
  1. humanity
  2. human race
  3. mankind
=3 第一次 dìyīcì the first time; for the first time
=3 第一次 dì-yīcì
  1. (euphemistic) first sexual experience
  2. (literally) first time
  3. first sexual experience
  4. first time
4 在 zài
  1. to exist; to be alive
  2. (of sb or sth) to be (located) at
  3. (used before a verb to indicate an action in progress)
=5 月球 yuèqiú the moon
=5 月球 Yuèqiú
  1. (astronomy) the Moon (referring to the astronomical object)
  2. the Moon (referring to the astronomical object)
6 上行 shàngxíng
  1. (of trains) up (i.e. towards the capital)
  2. (of river boats) to go against the current
  3. to submit (a document) to higher authorities
7 走 zǒu
  1. to walk
  2. to go
  3. to run
  4. to move (of vehicle)
  5. to visit
  6. to leave
  7. to go away
  8. to die (euph.)
  9. from
  10. through
  11. away (in compound verbs, such as 撤走 chèzǒu)
  12. to change (shape, form, meaning)