颗粒形态
颗粒形态
本机是一种双压式自动旋转,连续压片的机器,将颗粒状原料压制成各种片剂。
US particle physicists are inching closer to determining why the Universe exists in its current form, made overwhelmingly of matter.美国的粒子物理学家在探索为何现行的宇宙主要由正物质组成的过程中又进了一步。
Neutrinos, which have no charge and very little mass, form out of nuclear reactions and particle decays.质量极小且不带电的中微子,是在核反应和粒子衰变中产生的。