incomplete leaf

例句：

1. 1. The tree's incomplete leaf is a sign of its health.
   这棵树不完整的叶子是其健康的标志。
2. 2. The scientist observed the incomplete leaf and determined its species.
   科学家观察了不完整的叶子，并确定了它的物种。
3. 3.During the winter months, many plants lose their leaves to survive.
   在冬季，许多植物会失去叶子以生存。