Definition

Examples

• 医生建议每年秋天打流感疫苗。
  Yīshēng jiànyì měi nián qiūtiān dǎ liúgǎn yì miáo.
  Doctors recommend getting a flu vaccine every autumn.
• 孩子六岁时需要接这种疫苗。
  Háizi liù suì shí xūyào jiē zhè zhǒng yì miáo.
  Children need to receive this vaccine at age six.
• 这种疫苗的研发用了十年时间。
  Zhè zhǒng yì miáo de yánfā yòng le shí nián shíjiān.
  The development of this vaccine took ten years.