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TOEFL BNC: 9392 COCA: 10155

a part of an atom that has no electrical charge中子

TOEFL BNC: 9392 COCA: 10155
TOEFL BNC: 9392 COCA: 10155
TOEFL BNC: 9392 COCA: 10155
neutron
Atoms and parts of atoms: alpha particle, anion, antiparticle...

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