- And here as promised is that other operator -- looks a little weird, but because assignment is already using the equal sign to assign one value on the right to a variable on the left.

在这里正像所承诺的那样，其他的操作-,看起来有点怪异，但是因为“=“已经被用来当赋值运算符了,用来把右边的一个值赋值给左边的变量。

哈佛公开课 - 计算机科学课程节选

The efficiency for the one on the left q1 is minus w over q1, The efficiency prime for the one on the right is minus w prime over q1 prime.

左边的效率是,负w除以，右边的效率是,负w一撇除以q1一撇。

麻省理工公开课 - 热力学与动力学课程节选