我的课题《四川母鸡的下蛋可持续性》，它有三个关键词，四川、母鸡、下蛋可持续性。 The new PMC design and style is below! Learn more about navigating our up-to-date report layout. The PMC legacy look at may also be obtainable for a limited time. 分析和解释, 在可能的情况下, 添加自己的解释, 讨论与整个文献相关的发现的重要性; 一篇好的文献综述不单单是总结资料来源, 它应该分析, 综合和批判性评估,... https://thefairlist.com/story1357168/a-review-of-literature-review%E4%BB%A3%E5%86%99