And already we have cars that park themselves,collision avoidance systems that the car tells you that you're about to hit something or back into something.
VOA: special.2011.06.21
So if you've ever seen or used an old school typewriter, you might recall that when you're typing something out on an old mechanical typewriter, - when you like hit the char-- when you hit the enter key to move the head back to the left hand side to the next line or you would pull down some lever, it was really a two part process.
如果你们有谁曾经看过或用过老式打字机,可能还记得,当你在,这种老式打字机上打字的时候,当你-,敲入回车键,跳转到,下一行的最左边,或者,拉一下杆,这个需要两步走。
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