这是因为钋—210的放射性是以高能阿尔法粒子的形式存在的。
This is because the radioactivity emanating from polonium-210 is in the form of highly energetic alpha particles.
幻灯片出现：基本定律以一种有关于所有基本力和所有基本粒子的同统一量子理论的形式存在。
slide-" The basic law really takes the form of a unified quantum theory of all the fundamental forces and all the elementary particles."
透射电镜（TEM）观察到浓缩浆中纳米二氧化钛基本上是以单个粒子形式存在。
The TiO_2 powders in the concentrated slurries mainly existed in the state of single particles according to the TEM observation.
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