Royal jelly is secreted by worker bees.

蜂王浆是由工蜂分泌的。

Hormones are secreted by endocrine glands.

激素由内分泌腺分泌。

The cells secreted enzymes to aid in digestion.

细胞分泌酶来帮助消化。

The skin secreted oils to keep itself moisturized.

皮肤分泌油脂来保持湿润。

The bacteria secreted toxins that caused illness.

细菌分泌了导致疾病的毒素。

Do you know that insulin is secreted by the pancreas?

你知道胰岛素是由胰腺分泌的吗？

Prolactin is a hormone secreted by the pituitary gland.

催乳素是一种由脑垂体分泌的激素。

The plant secreted a sticky substance to trap insects.

植物分泌了一种粘性物质来捕捉昆虫。

The gland secreted a hormone that regulates metabolism.

腺体分泌了一种调节新陈代谢的激素。

Erythropoietin is a hormone secreted by the kidneys.

促红细胞生成素是一种由肾脏分泌的激素。