Eg: Harmony among peoples makes world peace possible, and world peace in its turn enhances harmony. 民族间的和睦有助于世界和平，而世界和平反过来促进和睦。
“：” 后的句子解释作用
the growth of knowledge : 知识的增长
compound-interest law [银行业术语]：复利法规则
which 指代 the growth of knowledge
printing ：印刷术
printing 对于知识的发展 is a great impetus
impetus: 推动力
all this… 这一切…
comparatively slow : 相对较慢
with the coming of science : with 引导插入语,科学的到来
Eg: 4 years ago, in American telecommunication is not so popular.
If a person can predict what happens in 30 years, he is…
It’s really hard mobile phone really so big as first as…
Then knowledge began to…
systematic ：系统化
Aristotle ：亚里士多德 把知识分类为：
Physics 物理学；Psychics 心理学；Poetics 诗学；Math 数学
The trickle became a stream; the stream has now become a torrent.
涓涓细流汇成小溪；小溪又变成了奔腾的江河。
...and education in its turn added to libraries: the growth of knowledge followed a kind of compound-interest law, which was greatly enhanced by the invention of printing. All this was comparatively slow until, with the coming science, the tempo was suddenly raised. Then knowledge began to be accumulated according to a systematic plan. The trickle became a stream; the stream has now become a torrent. ...