这里，非线性项是下有界的并且不需要是非负的。

Here, the nonlinear term is bounded below and need not be nonnegative.

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方程中的非线性项关于其变量可以具有奇性和间断性。

The nonlinear term in the equation may have singularity and discontinuity in its variables.

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同时，给出了扰动参数与滞后非线性项界线的估计公式。

Meanwhile, the estimation formulas of bounds for delays and parametric perturbation are given.

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