Maneuvering to one of the tables, Hawking clicked his control switch, evoking tiny beeps from his computer and selecting words from lists displayed on his screen.

• 他熟练地驶到其中一张桌子旁，轻敲他的控制开关，从计算机里发出哔哔声，并且从陈列在他的屏幕上的菜单中选择词。