mammary development

• 乳房发育

mammary development的用法和样例：

例句

1. In some cases the sow reaches the point of farrowing with normal udder development, even to the extent of producing milk, but there are no live births.
   在某些情况下，母猪到该分娩时，乳房发育正常，甚至到了产奶的程度，但最终没有活的仔猪产出。