watery sap

例句：

1. 1. The tree's watery sap is a vital source of nutrition for the bees.
   这棵树的水液是蜜蜂们营养的重要来源。
2. 2.The sap flowed from the trunk to the branches, nourishing the leaves and flowers.
   树液从树干流向树枝，滋养着叶子和花朵。
3. 3. The sap was thick and sticky, making it difficult to extract the honey.
   树液浓稠而粘稠，难以提取出蜂蜜。