Primary Discovery Learning: Footprints From the Past 来自过去的足迹

• Common features of living things. (form)
  生物的共同特点 （形式）
• Changes in living things over their lifetime. (change)
  生物一生的变化（变化）
• Responsibilities we have to care for living things in our local environment. (responsibility)
  我们有责任照顾当地的生物 (责任)

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点击这里浏览更多小学图书馆的书籍和在线资源。