A proton is an elementary particle of matter that possesses a positive charge.

质子是带正电荷的物质的基本粒子。

《柯林斯英汉双解大词典》

I'm going to say, quite to the contrary, the positive charge is concentrated at the center in a tiny, tiny, tiny volume.

我要说的是，完全相反，正电荷集中在中心，在一个非常非常小的体积内。

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It will be a particle with a positive charge and a positive mass.

它将是一个带着正电荷和正质量的粒子。

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President Obama denied the charge. The summit host,Trinidad and Tobago Prime Minister Patrick Manning, praised President Obama for a positive attitude, which he said set a congenial tone that ensured success at the gathering.

VOA: standard.2009.04.19

I'm going to say, quite to the contrary, the positive charge is concentrated at the center in a tiny, tiny, tiny volume.

我要说的是，完全相反，正电荷集中在中心,在一个非常非常小的体积内。

麻省理工公开课 - 固态化学导论课程节选

So, when we get really close together, granted, there is a net positive negative charge with a Coulombic force of attraction.

当它们真正离得很近时，假设有一个带正负电的电荷,带有库仑引力。

麻省理工公开课 - 固态化学导论课程节选

The gel coats the interior of the vessel with a plastic compound that has a net positive charge.

FORBES: Are Men Ready for a Contraception Injection?

These ions, like the hydrogen ions that are the heart of every acid, have a single positive charge.

ECONOMIST: Stomach turning

As microbes traveled through the polymer-lined pipes and encountered the strong positive charge, the attractive forces pulled them apart.

FORBES: Are Men Ready for a Contraception Injection?