这幅画的线条简洁明了，展现了完美的线性美。

The painting's simplicity showcases perfect ___linearity in its composition.

这个数学问题的解法遵循严格的线性步骤，一步一步来。

The solution to this math problem follows a strict ___linearity, step by step.

这个数学模型展示了变量之间良好的线性关系。

The mathematical model shows good ___linearity between the variables.