Once you have things in your pocket that can receive that message, 一旦你在口袋里有了能接受这个信息的装置， then you have the conditions that allow that we can write like we speak. 你就有条件来像说话一样打字了。 And that's where textin
And if we move back again, here, and we put on trails on them, like this, 我们再回到过去，给每个球画出运动的轨迹， you can see again that the speed of development is very, very different, 可以看到，发展速度的差距非常大， and the countri
