在开展科研工作和撰写学术论文时,了解一手文献(primary source)与二手文献(secondary source)之间的区别非常重要。 —手文献是关于某个事件或现象的原始的、第一手的资料,而二手文献是一手文献之外的其他资料,例如分析或诠释—手文献的书籍或文...
Smith, John.“The lmpact of Climate Change on Agriculture." Science, vol.325, no.5945,2010, pp.815-818.引用二手文献的格式其实相同。例如,如果你引用了一本由Jane Doe写的书作为二手文献,引文格式可能如下; Doe, Jane.The History of Climate Change.University Press, 2012, pp.45-50. 需要注意的是...
一次文献(primary source)和二次文献(secondary source)的主要区别 在开展科研工作和撰写学术论文时,了解一次文献(primary source)与二次文献(secondary source)之间的区别非常重要。一次文献是关于某个事件或现象的原始的、第一手的资料,而二次文献是一次文献之外的其他资料,例如分析或诠释一次文献的书籍或文章。本文解...
在学术研究和论文写作中，了解一次文献（primary source）和二次文献（secondary source）的区别至关重要。一次文献，如原始报告或事件记录，提供第一手信息，是研究的基础；二次文献则是对一次文献的分析、解释或评论，如书籍和文章。使用它们时，一次文献用于支持观点，二次文献则提供背景和理解框架。例如...
例如,我们可以说:“The primary purpose of this research is to investigate the effects of climate change on biodiversity.”(这项研究的主要目的是调查气候变化对生物多样性的影响)。这个短语强调了出发点和结果导向。 4. Primary source(二级标题) Primary source意为“主要来源”,指那些提供了直接信息或原始...
EPA chief claims carbon dioxide is not a primary contributor to climate change, despite scientific consensusRafi Letzter
This particular source of the GHG water vapor is by far the greatest. It is also the easiest to control. All they need to do is shut down all geoengineering programs until a new baseline can be determined across the whole range of GCC contributions factors. Nonstop Chemical Geoengineering ...
Before∼70 kyr ago, charcoal peaks in the Cape Pasley record are associated with high values for Myrtaceous elements (Fig. 2;Supplementary Fig. 4), indicating that sclerophyll forests were the principal source of fuel for fires. After∼70 kyr ago, lower and more stable values for charcoa...
At NASA, scientists study the global methane budget to better understand the primary sources of methane emissions and how they contribute to climate change. In addition to the human sources, methane is also produced in natural settings. The greatest natural source of methane is wetlands, which con...
His country’s primary source of income, agriculture, was threatened by desertification and climate change. 作为阿富汗主要收入来源的农业受到荒漠化和气候变化的威胁。 UN-2 The following are the primary sources of data and information used in the present report 本报告所用数据和资料主要来自以下方...