可以由疾病引起，如胰腺外分泌不足、摄食过饱或吸收不良；

It can be caused by medical conditions such as exocrine pancreatic insufficiency, overfeeding, or malabsorption.

在胰的外分泌部和内分泌部（胰岛）均可观察到生长素的表达。

Ghrelin immunopositive cells were simlarly observed in the exocrine portion and endocrine portion (pancreas islet) of pancreas.

硅藻已经通过胞外分泌二氧化硅，这是细胞直接把物质分泌出细胞壁的一个生物过程。

Diatoms already secrete silica by exocytosis-a biological process by which cells direct secreted material outside the cell walls.