求助一句英译汉！

馅饼

         诸位大神，馅饼在翻译某书的过程中遇到一句话，颇费了一番思量之后，仍旧拿捏不准，所以拿到论坛来求诸高手，敬请指教！

英文原句（红色部分）及所在段落：
    From its inception, therefore, Chinese civilization was much less affected by the Middle
Eastern model than were the civilizations of either India or Greece. In a sense, therefore, the
cultural development of Eurasia after 1500 B.C. was twofold rather than fourfold. Middle
Eastern, Indian, and Greek civilization constituted a single, loose geographical continuum, with
zones of transition between the three principal segments, while Chinese civilization stood
apart and isolated in the Far East. Yet in view of subsequent history, it seems best to regard
the styles of life which emerged in India and in Greece about 500 B.C. as distinct, though
interrelated civilizations, comparable in magnitude and historic importance to their Middle
Eastern prototype and to the distant Chinese offshoot.
     Here we may see a double pulse beat of history on the largest scale. In the age of river
valley civilization, Mesopotamian stimulus had hastened the development of the Egyptian and
Indus civilizations until they arrived at an inner perfection and balance which inhibited further
borrowing from outside. There ensued about a thousand years of approximate equilibrium,
between roughly 2700 and 1700 B.C., during which time the civilizations of Mesopotamia, Egypt,
and the Indus developed separately in accordance with their own inner momenta. This world
balance was slowly modified during the closing centuries of the third millennium B.C. and the
opening centuries of the second millennium B.C. by the rise of civilized communities on rain-
watered land, most notably in the lands bordering Mesopotamia. But the definitive upset of the
old river valley civilizations came only after 1700 B.C., when barbarians from the steppes, armed
with the latest technological improvements, burst upon the old centers of civilization.

馅饼试译：
        因此，中国文明自诞生伊始就远比印度文明和希腊文明较少地受到中东文明模式的影响。从某种意义上讲，公元前1500年之后欧亚文明的文化发展是双轨而非四轨。中东、印度和希腊这三个主要文明，加上她们之间的过渡地带，构成了一个单独的、关系松散的地理学连续统一体（geographical continuum）；而中国文明孤立地屹立于远东。不过，考虑到后来的历史进程，我们最好将公元前500年出现于印度和希腊两地的生活方式看作既相互关联，但又各不相同的文明。她们伟大的历史地位可以与中东文明和遥远的中国文明相媲美。
        从中我们能窥见历史的一股双重脉冲在最大程度上的跳动。在流域文明时代，美索不达米亚文明的刺激加快了埃及文明和印度文明的发展，直至这两个文明达到了内部的完善和平衡，不再向外部借鉴为止。随后是约千年之久的大体稳定时期，这一时段大约从公元前2700年延续到公元前1700年，在此期间，美索不达米亚文明、埃及文明和印度河文明都凭借内在动力独立地发展。在公元前第三个千年的最后几个世纪和公元前第二个千年的最初几个世纪里，雨水丰盛的地区，尤其是美索不达米亚毗邻地区的文明社会的兴起，缓慢地改变了这种世界均衡。但是，只是在公元前1700年之后，来自草原的，用最先进技术武装起来的蛮族对旧的文明中心的冲击才彻底摧毁了历史悠久的流域文明。

maggie

在这里，我们可以看到规模最大的历史双脉冲。

power

学习了

馅饼

power 发表于 2013-4-20 00:27
学习了

敬请power兄指正。

馅饼

maggie 发表于 2013-4-19 17:38
在这里，我们可以看到规模最大的历史双脉冲。

多谢maggie赐教！
按照你的翻译，段落之间的过渡顺畅了很多。
五体投地ing……

maggie

馅饼 发表于 2013-4-20 21:17
多谢maggie赐教！
按照你的翻译，段落之间的过渡顺畅了很多。
五体投地ing……

My pleasure, and note that don't put such kind of materials on board, this is a place for entertainment, oK? thx.

馅饼

maggie 发表于 2013-4-20 21:34
My pleasure, and note that don't put such kind of materials on board, this is a place for entertai ...

Ok，thanks for reminding me.