Prof Hawking, who is confined to a wheelchair by motor neuron disease, MND, was commenting using a muscle below his right eye to operate - via a switch on his glasses - his voice synthesiser.

• 霍金教授由于运动神经元病而困坐轮椅，他用右眼下的肌肉，透过眼镜上的开关，操作他的发声合成器发表这项意见。