他在20岁的时候写了这本书。

He wrote this book at the age of twenty.

Source: Tatoeba

Sentence Composition

1
  1. (third-person singular) (since the early 20th century, usu. male) he; him; his
  2. (bound form) other; another; some other (as in 他日 and 他人 rén)
2 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)
=3 suì
  1. variant of suì, year
  2. years old
=3 suì
  1. classifier for years (of age)
  2. year
  3. year (of crop harvests)
=4 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 de "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. or di in poetry and songs
=4 a taxi; a cab (abbr. for 的士 shì)
=4 really and truly
=4 (bound form) bull's-eye; target
5 时候 shíhou
  1. time
  2. length of time
  3. moment
  4. period
=6 xiě to write
=6 xiè used in 写意 xiè
=7 le
  1. (completed action marker)
  2. (modal particle indicating change of state, situation now)
  3. (modal particle intensifying preceding clause)
=7 liǎo
  1. to finish
  2. (used with or after a verb to express (im)possibility, as in 忘不了 wàngbuliǎo "cannot forget")
  3. (literary) (usually followed by a negative such as or ) completely (not); entirely (not); (not) in the least
  4. to understand clearly (variant of liǎo)
=7 liǎo
  1. (of eyes) bright
  2. clear-sighted
  3. to understand clearly
=7 liào unofficial variant of liào
=8 zhè
  1. (pronoun) this; these
  2. (bound form) this; the (followed by a noun)
  3. (bound form) this; these (followed by a classifier) (in this sense, commonly pr. zhèi, esp. in Beijing)
=8 zhèi (coll.) this
9 本书 běnshū
  1. book of genealogy
  2. original book; original work
  3. this book