leaf fascicle

例句：

1. 1. The scientiststudied the leaves of the plant to determineits health.
   科学家研究了这种植物的叶子，以确定它的健康状况。
2. 2. The book isdivided into several leaf fasciclesfor easy reading.
   这本书被分成几个叶集，以便阅读。
3. 3. The researchers collected leaf samplesfrom different locations to study their genetic diversity.
   研究人员从不同地点收集了叶子样本，以研究它们的遗传多样性。