sap是什么意思

sap的例句：Maple syrup is made from sap extracted from the sugar maple tree.槭糖浆是用糖槭树中提取的树液制成的。

The hot sun sapped our energy.火辣辣的太阳烤得我们虚软无力。Years of failure have sapped him of his confidence.连年失败使他逐渐丧失了自信。

The leaves,bark and sap are also common ingredients of local herbal remedies.树叶、树皮和树汁也是当地草药的常用药材。