ovarian tumor的用法和样例：
例句
- Functionally, there is eidence showing a direct action of gonadotropins on oarian tumor cell growth.
证据表明促性腺激素在功能上对于卵巢肿瘤细胞生长具有直接作用。 - The diagnosis is made histopathologically, and the differential diagnosis between benign and malignant ovarian tumors cannot be made until operation.
诊断依靠组织病理，良恶性卵巢肿瘤的鉴别诊断只有通过手术才能确定。
