She organized a group of about 150 local businesspeople to lurk around Copley Square and, after a secret signal, in broad daylight to burst into a dance they'd rehearsed.
It is chiefly characterized by increasing the amplitude and the duty cycle of the signal, and reducing the interference of the daylight with a special circuit.
其主要特点是通过特殊电路提高信号的幅度和占空比，同时抑制日光干扰。
3
The electrical signal alters the transmission of the electrochromic layer, and thus its opacity to daylight and solar heat.