The first line consists of an "action", @, and a device path under sysfs (i.e. normally at /sys/devices/pci…). The rest of the lines contain key-value pairs that depend on the individual drivers and subsystems in the kernel. udev is then expected to match this information with rules it knows about in order to set up the new device.
HTMLMediaElement: srcObject property — MDN Web Docs，详情可参考WPS官方版本下载
self.sleep_max = 1.0，这一点在体育直播中也有详细论述
This list has, in order:
pool.shutdown();