bird flu vaccine

• Chinese scientists began their research on bird flu vaccine in 2005
  中国有关专家于2005年开始禽流感疫苗的研制。
• Chinese scientists began their research on bird flu vaccine in 2005
  中国科学家于2005年开始研究禽流感病毒疫苗。
• Chinese scientists began their research on bird flu vaccine in 2005
  中国科学家是从2005年开始对禽流感进行研究。
• Chinese scientists began their research on bird flu vaccine in 2005
  中国科学家开始他们的禽流感疫苗研究与2005年
• Chinese scientists began their research on bird flu vaccine in 2005
  中国科学家从2005年就开始着手研究禽流感疫苗。
• Chinese scientists began their research on bird flu vaccine in 2005
  中国科学家于2005年开始研究预防禽流感疫苗的。
• Chinese scientists began their research on bird flu vaccine in 2005
  中国的科学家2005年开始了对禽流感疫苗的研究。
• Chinese scientists began their research on bird flu vaccine in 2005
  中国科学家于2005年开始关于禽流感病毒的研究。
• Chinese scientists began their research on bird flu vaccine in 2005
  中国科学家们于2005年开始了对禽流感疫苗的研究。
• Chinese scientists began their research on bird flu vaccine in 2005
  中国科学家在2005年时开始他们对禽流感疫苗的研究。