america is a developed country造句

• America is a developed country of science and technology
  美国是一个科学技术发达的国家
• America is a developed country which has advanced science technology
  美国是一个科学技术发达的国家
• America is a developed country . china is a developing country
  中国是个发展中国家.美国是个发达的国家
• America is a developed country
  中国是个发展中国家
• America is a developed country
  美国是发达国家。
• America is a developed country
  美国是发达国家
• Mexico is a developing country , while america is a developed country . the means and experience in processing pollution problems in border areas between both
  两国在处理边界环境问题时的做法和经验对于其他各国,特别是广大发展中国家处理类似问题具有借鉴意义。