重点讲解：
1. run out
用完；耗尽；
eg. His term of office has run out.
他的任期已满fJNW5XO897wRRr)ysa+。
eg. Our time is running out.
我们剩下的时间不多了+c~-|rWEu@r。
2. on hand
在手头；在近处；现有；
eg. He has too much work on hand to go picnicking with us.
他手头的工作太多了，不能跟我们去野餐s=mxT[F!;]zPio4L。
eg. I always like to keep a certain amount of money on hand.
我总喜欢在手头备好一笔钱|Ut0An6!.Jb@]V。
3. get into the habit of
养成……习惯；
eg. We should get into the habit of keeping good hours.
我们应该养成早睡早起的习惯*,IG)5o*=XC。
eg. We should get into the good habit of using our time wisely.
我们应该养成明智利用时间的一个好习惯3FZBCz^L[9R。
4. keep on
重复；继续；
eg. And then keep on challenging yourself, because learning doesn't end with graduation.
然后要继续挑战自我，因为学习不是到毕业就终止了9h%]9G3=ELCuP~hLE。
eg. I have failed several times, but I still keep on.
我已经失败了好几次，但我仍然要继续下去ZGeF,R=#i^][D18n]。