secretion

分泌，分泌物英释中释na substance, usually liquid, produced by part of a plant or animal

1 internal secretion,n. 内分泌

2 milk secretion,乳汁分泌

3 gastric secretion,[生]胃液分泌

1 These secretions are used by the caterpillar as a defence..这些分泌物被毛虫用作自卫武器。