Fractory
中铝粘土质耐火材料
🗣️ 情景例句
you have a lunch appointment with Mr. Levine,
跟Levine先生约好吃午餐。
Hello. Is Mrs.James in, please?
喂，请问詹姆斯太太在家吗？
a trough (the lowest point), a height (the vertical distance from the trough to the crest),
波谷（最低点）、浪高（从波谷到浪峰的垂直距离）