"初中"在英语中被称为"middle school"。
来源："Middle"在英语中指中间，而"school"指学校，因此"middle school"就表示中间学校。
例句：
I went to middle school in New York City. (我在纽约市读过初中。)
My son is in the 8th grade of middle school. (我儿子在初中八年级。)
After middle school, students usually go to high school. (初中之后，学生通常会去上高中。)