physical ripening

例句：

1. 1.The fruit is physically ripening, but it's still a bit hard to bite.
   这个水果正在物理成熟，但仍然有点硬，不容易咬。
2. 2. The farmer needs to wait for the soil to physically ripen before planting seeds.
   农民需要等待土壤物理成熟后再播种种子。
3. 3.The process of physical ripening is crucial for the quality of the produce.
   物理成熟过程对于农产品的质量至关重要。