Leaf aging的用法和样例：
例句
- The changes of polyamines during peanut leaf senescence of two different senescent type peanut varieties were studied.
在大田条件下以两个不同衰老型花生品种为材料，研究了叶片衰老过程中多胺的变化。 - The metabolizing course of reactive oxygen species in rice leaves and regulatory countermeasures of delaying leaf senescence were introduced in the paper.
介绍了水稻叶片中活性氧的代谢过程及目前延缓叶片衰老的调控手段。
