检查下面句话有没有语病：However, the excessive laser processing, such as laser beam overlap and multiple scanning, generated both a thick brittle recast layer and a thin thickness.

However, excessive laser processing, such as laser beam overlap and multiple scanning, generated both a thick, brittle recast layer and a thin layer.

改正了语病，加了逗号和“layer”来使句子更加清晰。