融合重氢同位素需要大量能量，部分原因是因为原子核带正电并相互排斥。

Fusing heavy hydrogen isotopes requires lots of energy, partly because the nuclei are positively charged and repel each other.

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伦敦大学学院的研究人员发现，自由派往往有一个较大的前扣带皮层，而保守派则有较大的杏仁核。

Researchersat University College London found that liberals tend to have a larger anteriorcingulate cortex, while conservatives have a larger amygdala.

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Wright系统的核是一个标准化的4x12 x 24英寸的带凹面的混凝土或玻璃砖块。

At the core of Wright's system was a standardized 4x12x24-inch concrete or glass block with concave edges.

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According to this theory, the atoms consist of a positively charged nucleus surrounded by a stream of electrons kept together by attractive forces from the nucleus.

根据这个理论，原子由一个带正电荷的核组成,由于来自核的吸引力,电子流围绕在核的周围。

麻省理工公开课 - 固态化学导论课程节选

And, it involves a single electron orbiting a positively charged nucleus.

包含了一个单独的电子轨道,一个带正电荷的核。

麻省理工公开课 - 固态化学导论课程节选