Remove grammatical mistakes: A good moderator is the one that should not absorb too much energy when the neutrons bounce off nor absorb the neutrons before they split.
The,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
TheD is theD is theD.

• I think this is a good example of a sentence that is not correct. – user63281 Jan 16 '18 at 14:00
• @J.B.B. I don't think so. I think the sentence is a typo. – user12466 Jan 16 '18 at 14:05
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