exudates

The cherry tree's trunk was covered with a shiny exudate, which made it look like the bark was wet.

用法提示：exudate 为名词，指从植物表面渗出的液体或物质，此处作宾语。

When the grapevine is damaged, it releases a clear exudate that soon hardens into a protective layer.

用法提示：exudate 为名词，表示从植物伤口渗出的液体，此处作宾语。

The gardener wiped the exudates off the rose stems to keep insects away.

用法提示：exudates 是 exudate 的复数形式，指多处或多种渗出物，此处作宾语。