阅读并回答：
The Monument to the Peoples Heroes
Eternalglory to thepeople's heroes who laid down their lives for the people's liberation war and revolution inthe last three years．
Eternalglory to the people's heroes who laid down their lives for the people's liberation war and revolution in the last thirty years．
Eternalglory to the people's heroes who laid down their lives in the all previous struggles for resistance of the enemy，for national independence，and for people's freedom and well-being． The First Session of
the Chinese People's Political Consultative Conference
September30，1949
（1）这是摘自何处的一段话的翻译？
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（2）原文是谁写的？
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（3）“the last three years”起止何时？
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（4）“the last thirty years”起止何时，这一时期革命的性质是什么？
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