3 sentences for 针 (zhēn — injection)

1. 你往我脖子上扎了一针。

   nǐ wǎng wǒ bó​zi shàng zhā le yī zhēn.

   You stuck a needle in my neck.

   Source: OpenSubtitles

2. 护士在他胳膊上扎了一针。

   hù​shi zài tā gē​bo shàng zhā le yī zhēn.

   The nurse gave him an injection in the arm.

   Source: Dong Chinese Dictionary

3. 生病时打一针会好得快一些。

   shēng​bìng shí dǎ yī zhēn huì hǎo de kuài yī​xiē.

   Getting a shot will help you recover faster when you are sick.

   Source: Dong Chinese Dictionary