Eg: You were walking on the way, he loomed out of mist.
Although…
in intelligence/morality 在智力/道德方面
undergone: experienced 经历
no general improvement 注意 no 的位置
no 用 not any 替换，则…has undergone no general improvement…
等同于：…has not undergone any general improvement…
“…, it has made extraordinary progress in the accumulation of knowledge.”
it 指代人类
accumulation: 堆积，堆砌
extraordinary progress: 显著进步
主题句提出，做原因解释
Knowledge began to…
be communicated :可以交流，传递 another = another individual
speech :口语
oral adj. :口头的
Eg: … people go hunting.
I found the place where the bears are inhabited.
with… :随着…
writing = written language
a great advance 巨大的进步
not only … but also …
communicated 交流； stored 储存
libraries: a place where books of various kinds are stored
and education in its turn added to libraries…
Why does the idea of progress loom so large in the modern world ? Surely because progress of a particular kind is actually taking place around us and is becoming more and more manifest. Although mankind has undergone no general improvement in intelligence or morality, it has made extraordinary progress the accumulation of knowledge. Knowledge began to increase as soon as the thoughts of one individual could be communicated to another by means of speech. With the invention of writing, a great advance was made, for knowledge could then be not only communicated but also stored. Libraries made education possible, and education in its turn added to libraries:...