Leaves senescence的用法和樣例：
例句
- The changes of polyamines during peanut leaf senescence of two different senescent type peanut varieties were studied.
在大田條件下以兩個不同衰老型花生品種為材料，研究了葉片衰老過程中多胺的變化。 - It showed that paclobutrazol decreased the polyamines in young leaves, but increased the polyamines in matrured leaves and delayed senescence at the same time.
結果證明多效唑對內源多胺的影響較複雜，多效唑降低了幼嫩葉片的多胺含量，卻提高了成熟葉片衰老階段的多胺含量，並起到延緩衰老的作用。
