lobules of mammary gland

例句：

1. 1.The mammary glands are responsible for producing milk in the female mammals.
   乳腺负责在雌性哺乳动物中产生奶。
2. 2.In the human body, there are several lobules of the mammary gland that produce milk.
   人体中有几处乳腺小叶，它们产生奶水。
3. 3.The lobules of the mammary gland are connected by ducts to form a network of milk passages.
   乳腺小叶通过导管连接形成奶液通道网络。