You can calculate your discretionary income by taking your total income and subtracting your taxes and cost-of-living expenses.

你可以用你的总收入减去你的税和生活费来计算你的可自由支配收入。

It's all about adding and subtracting.

全是关于加减法的运算。

Learn to add responsibly instead of subtracting.

学会负负责任地使用加法并取代减法。

Try adding up this time instead of subtracting.

这次试用加法，不用减法。

You do this by subtracting the number of bytes required from esp.

方法是从esp中减去所需的字节数。

A signed integer type that results from subtracting two Pointers.

这是一个有符号整型，是两个指针相减后的结果。