And then there is this third species, the neutron, which has no charge.
这是第三种了，中子，不带电。
2
No one now knows how easy it would be to turbo-charge an existing human pathogen, or take one that infects another type of animal and assist its passage over the species barrier.
Secondly, factors influencing charge decay of pulp slurry suspension, such as stirring rate, pulp species, adding amount of polyelectrolyte, adding amount of cationic polymer etc. were discussed.