Base 10 logs are so common that we often leave the subscript 10 off when we write it.

所以们有了这个可怕的数学定义。

We write it as f, with a subscript of 1.

们把它写成 f，符号 1。

This little subscript two tells us there's two of the hydrogen atoms in this molecule.

这个小下标 2 告诉们这个分子中有两个氢原子。

He sees some that are 3 pages long, some that are 15, some with bolded sections and others with italics and subscripts highlighted in green.

他看到有的 3 ，有的 15 ，有的部分用粗体标出，有的部分用斜体标出，还有的部分用绿色标出。

We can write this out as an equation for each coil separately, using a subscript P for the primary coil and a subscript S for the secondary coil.

们可以将其分别写为每个线圈的方程式，使用下标 P 代表初级线圈，下标 S 代表次级线圈。