senescence(老化)から
老化
leaves were measured after they reached full size and before they showed signs of senescence
葉は完全に成長し、老化の兆候が現れる前に測定された。
細胞の老化
Senescence occurs when a cell loses its ability to divide and grow.
細胞が分裂や成長能力を失うと老化が起こる。