你需要两个才能凑成一对。

You need two to make a pair.

Source: Tatoeba

Sentence Composition

=1 你 nǐ you (informal, as opposed to courteous 您 nín)
=1 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.)
2 需要 xūyào
  1. to need; to want; to demand; to require
  2. needs
3 两 liǎng
  1. two
  2. both
  3. some
  4. a few
  5. tael, unit of weight equal to 50 grams (modern) or 1⁄16 of a catty 斤 jīn (old)
=4 个 gě used in 自个儿 zìgěr
=4 个 gè
  1. (classifier used before a noun that has no specific classifier)
  2. (bound form) individual
=4 个 gè variant of 个 gè
5 才能 cáinéng
  1. talent
  2. ability
  3. capacity
6 凑成 còuchéng
  1. to put together
  2. to make up (a set)
  3. to round up (a number to a convenient multiple)
  4. resulting in...
7 一对 yīduì couple; pair