Other alternative input devices include single switch devices, devices that track head movements, and alternative keyboards for persons with mobility impairments.
其它可选择的设备包括单一切换设备、跟踪头部移动的设备，和用于行动困难的人可选择的键盘。
2
Given everything that happened, rain at the start, the safety car, the switch to slick tyres when the track was still very slippery - we did a great job.
发生了那么多的事情，开始阶段的雨，安全车，在赛道还很湿滑时换上软胎——但我们还是干的非常好。
3
Bejerano and colleagues took the switch information from a chimpanzee's genome and essentially "hooked it up" to a reporter gene, a gene whose effects scientists can track as an organism develops.