宝春

各位同学们，为了督促帮助大家持续提升英语能力，培君老师们特意给大家准备了托福每日一包。每天覆盖听说读写内容，坚持完成两周以上，就能见到自己的英语能力不断上涨哟。

1. 听写包答案：

Is that the same as density?

That’s right. Both richness and density refer to the number per area.
Rich clusters, or dense clusters, contain a relatively high number of galaxies.
And symmetry just refers to its shape?
Roughly speaking, yes.
Whether the shape of the cluster was the same on the left side as on the right side.
So Abell used categories like that to classify clusters on a scale: from regular to irregular.
A regular cluster is sphere shaped, symmetrical, and most dense in the middle,
the greatest number of galaxies concentrated in the middle of the cluster.
And irregular cluster might appear to be lopsided, asymmetrical, with a little concentration of galaxies in the center.
是不是和密度一样？
没错。丰富程度和密度指的都是每单位区域内的数量。
丰富的星团或密度大的星团包含了相对较多的星系。
而对称性指的只是它的形状？
粗略来说的话，是的。
指的是星团左边的形状和右边的是否一样。
所以Abell用了像这样的类别对某个规模上的星团进行了分类：从常规的到非常规的。
常规的星团是球形的、对称的、而且在中间最密集，
也就是说星团中间聚集的星系数量最大。
而非常规的星团可能看起来不太平衡、不对称、中间没有什么星系聚集。

2.  阅读包答案：

他指出自己总不能简单明了地表达思想。但是，他认为，或许正是这种困难补偿了他的缺点，有利于迫使他长时间专注地思考每句话从而让他发现自己在推理和观察中的错误。 .

3.  写作包答案：

Long before the emergence of the written word, ballads and myths, passed around by word of mouth, were widely popular. Chinese literature finds its origins in these traditions. However, ballads were what people improvised out of daily life, and due to lack of means to record and preserve them in ancient times, they quickly disappeared without leaving much of a trace. Today, we can only deduce their existence from ancient books, which recorded some time-honored ballads, though most of these are believed to be derivatives of later generations. Ballads in The Book of Songs are the earliest writings that can be dated. From this point of view, ancient mythology has had a greater influence on Chinese literature.