1. The center of a starch granule. 
   淀粉颗粒的中心
2. small granule (of e.g. chrysolite) found in some meteoric rocks. 
   一些陨石中发现的细小微粒（如贵橄榄石微粒）。
3. A small round granule of extraterrestrial origin found embedded in some meteorites. 
   陨星粒养体嵌在某些陨星上的来自行星际的小圆颗粒
4. a lamellar mixture of cementite and ferrite formed during the cooling of austenite; a micro-constituent of steel and cast iron. 
   在奥氏体冷却的过程中形成的碳素体和铁素体的层状混合物，是钢和铸铁的微量成分。
5. One of numerous particles located on the inner lamellar surface of a chloroplast and sometimes considered to be the functional unit of photosynthesis. 
   光能转化体附着在叶绿体内表层的许多微粒之一，时常被认为是光合作用的机能单位

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