每前进一步都可能遇到意想不到的困难。

Every step forward requires testing the ground ahead for shifting sands.

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做人要像竹子一样每前进一步，都要做一次小结。

Be like bamboo every step forward, to do a summary.

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对光和光子的认识和利用每前进一步，人类社会就前进一大步。

With every step forward in recognizing and utilizing photon and light, the human society will make further a big stride forward.

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