calculus：n. 微积分
【视例】I need to study for my advanced calculus test.
我得准备下微积分考试。
——来自于《Cougar Town Season 1 (2)》
cut off：使某人通话中断，切断
【视例】 We are cut off. Copy? We are cut off.
我们被切断了。收到了吗？我们被切断了。
【讲解】切除 He had a finger cut off by a machine while working. 他在工作时被机器切掉了一个手指。
——来自于《We Were Soldiers》