It is what lies behind the eerie skills of face-recognition programs and what makes it possible for personal assistants such as smart speakers in the home to pick out spoken requests and act on them.请问这是what引导的并列的表语从句吗?
下面的句子中when引导的是什么从句?The moon's brightness will wash out the Perseids, so you have to catch the chance before dawn, when the moon is closer to setting.截图里是原文: