flower abscission

• 花蕾脱落

flower abscission的用法和样例：

例句

1. The buds on the twig are an important diagnostic characteristic, as are the abscission scars where the leaves have fallen away.
   小枝上的花蕾是辨别物种的重要特征，树叶脱落后在枝上留下的叶痕也同样重要。