你可以通过按钮或语音识别来激活系统。
You can activate the system by buttons or voice recognition.
他说：“你不再需要通过按钮来进行字母输入，指头的一个手势就可以了。”
"Instead of pushing a button to get a letter, you gesture with a finger," he says.
通过按钮能够在时间上前移或后移，能够回到过去的任意时间点，并且能够回到当前的时间点。
Using buttons, you can move forward or backward in time, to go back to any date and time in the past and return to the current time.
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