Cylindrical "forearms" house small electric motors, known as actuators, which pull on metal tendons that move the fingers with precision.
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，这一点在Line官方版本下载中也有详细论述
Exact terms of deal have yet to be revealed。谷歌浏览器下载对此有专业解读
https://source.android.com/docs/core/camera/camerax-vendor-extensions
self._background_tasks.add(task)