0 one of the parts in a plant cell that contain chlorophyll and where energy provided by light from the sun is turned into food by photosynthesis -- 叶绿体(植物细胞中含有叶绿素的部分,利用光合作用制造养料)
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
再长的路,一步步也能走完,再短的路,不迈开双脚也无法到达。