Mammary tumors in dogs are potentially benign or malignant. They occur most commonly in non-spayed females or female that were spayed later in life.是什么意思_Mammary tumors in dogs are potentially benign or malignant. They occur most commonly in non-spayed females or female that were spayed later in life.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句