你需要用一把钥匙打开那个盒子。

You need a key to open the box.

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 用 yòng
  1. to use; to make use of; to employ
  2. (coverb) with; using
  3. to need; to have to (usu. used in the negative or in questions)
  4. usefulness; utility
  5. (bound form) expense; outlay
  6. (courteous) to eat; to drink
  7. (literary) hence; therefore
4 一把 yībǎ a bunch of; a bundle of
5 钥匙 yàoshi key

classifier: 把
6 打开 dǎkāi
  1. to open
  2. to show (a ticket)
  3. to turn on
  4. to switch on
7 那个 nàge
  1. that one
  2. that thing
  3. that (as opposed to this)
  4. (used before a verb or adjective for emphasis)
  5. (used to humorously or indirectly refer to sth embarrassing, funny etc, or when one can't think of the right word)
  6. (used in speech as a filler, similar to "umm", "you know" etc)
  7. (euph.) menstruation
  8. sex
  9. also pr. nèige
8 盒子 hézi
  1. box; case
  2. hezi – a savory turnover-like pie in northern Chinese and Mongolian cuisines