abscission of fruits

例句：

1. 1. The tree's branches are beginning to abscise from the main trunk.
   树枝开始从主干上脱落。
2. 2.The scientist found that the cells were undergoing a process of abscission.
   科学家发现细胞正在经历一个过程，即脱落。
3. 3. The flowers on the petals began to abscise, revealing the green leaves underneath.
   花瓣上的花朵开始脱落，露出了下面的绿叶。