这个复杂的数学问题可以简化为几个基本步骤。

This complex math problem is ___reducible to a few basic steps.

塑料瓶可以通过特殊工艺转化为纤维材料。

Plastic bottles are ___reduced to fiber materials through a special process.

这个复杂的数学问题可以被简化为几个基本公式。

This complex math problem is ___reducible to a few fundamental formulas.