primary signal face的用法和样例：
例句
- What was needed was Heron's regula, a counter signal to rein in the chief signal, to dampen the effect of the perpetual recycling.
所以，这里就需要某种类似于海伦的调节装置的东西，能够产生抑制主信号的反向信号，减弱不断重复的循环所带来的影响。 - A multi-kernel nonlinear diffusion model for image denoising based on image decomposition was studied, which got the major signal and the minutiae through different models.
摘要研究了一种基于图像分解的多核非线性扩散去噪方法，利用两个非线性扩散模型分别提取图像的主信号和细节信息。
