lethality rate的用法和樣例：
例句
- Lung cancer is an important disease with a very high fatality rate in many countries.
摘要肺癌是中外各國均極重視且致死率甚高的一種癌症。 - Commonly, these tumors have vascular or lymphatic invasion.High mitotic rate, necrosis and nuclear pleomorphism are also frequent.
此疾病常有淋巴及血管浸潤，一旦擴散至頸部淋巴節往往視為不良預后，隨之容易有遠端轉移而具高致死率。
