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单词 antimatter
释义 an·ti·mat·ter
\ˈ ̷ ̷(ˌ) ̷ ̷ at anti- I +ˌ ̷ ̷ ̷ ̷\ noun
(-s)
Etymology: anti- (I) + matter
: matter composed of the counterparts of ordinary matter, antiprotons instead of protons, positrons instead of electrons, and antineutrons instead of neutrons
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