叶绿体是植物细胞内的一种重要细胞器，它起源于早期具有光合能力的原核生物与真核生物的内共生事件。
Plastids are essential organelles of plant cells and it is believed that plastids have arisen from an endosymbiotic event between a protoeukaryote and a photosynthetic prokaryote.
叶绿体是植物进行光合作用的细胞器，“内共生学说”认为叶绿体起源于蓝藻类的原核生物。
Chloroplast is an organelle specialized for carrying out photosynthesis in plants and descended from cyanobacteria according to endosymbiosis.
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