长期单一种植小麦导致土壤养分失衡。

The ___monoculture of wheat for many years has caused nutrient imbalance in the soil.

教育系统中过度强调标准化考试可能会导致单一文化，抑制学生的创造力。

Overemphasis on standardized testing in education may create a ___monoculture that stifles students' creativity.