Then we spent 900 thousand years learning to make and use tools; Speed Date

Again another 90 thousand years getting acquainted with fire and its usefulness;Hotel design layout

Again 9 thousand years becoming gradually experienced in farming;MADGOD

Again 9 hundred years acquiring the skills in building machines...turn back sea flower

But in this century, the present hundred years,we've learned flying;Achieved the use of nuclear energe-the ultimate energy we can ever tap,And succeeded in landing on the moon.kick life to star

It's said that we'll eventually be able to retain vitality against aging.embrace this warm winter

We have boundless abilities and potentialities.So let us be blessed.dare drunk deep

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