回到这个点的时候，x，then，when，it，is，back，at，this，point，肯定是-,为了方便我用0表示-,加上133米每秒，这是X方向的速度，它没有变过。
x Xo must be x zero-- - which I conveniently choose zero-- plus 133 meters per second, which is the velocity in the x direction, which never changes.
“我以后再去，幸好这样能为你们家提供一点方便，”他接着说，用一句挖苦话作拙劣的掩护。
"I'm not going till later on: luckily for the convenience of your family, " he continued, taking base refuge in sarcasm.
附近也没有大型的购物中心，而且学校不准我们用自己的车，所以这一点对于新生来说很不方便。
Most ppl just stay on campus. There are no malls near by which is quite inconvenient for freshmen since we are not allowed to bring our cars.
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