The blockiteration method is used in solving these linear equations.
采用收敛速度快的块迭代法解代数方程组。
2
Groovy also implements the handy default behavior of automatically supplying a parameter for your iteration named it, which you can reference within the code block.
Groovy还实现了方便的默认行为，为名为it的迭代自动提供参数，您可以在代码块中引用。
3
Is it better to use continue to skip to next iteration or put everything inside else (or equivalent) block?