Democrat Party lawmakers and health reform advocates celebrated in the East Room of the White House, as President Obama signed historic legislation to overhaul the U.S.health care system.

VOA: standard.2010.03.23

But all of you in this room probably remember what we technically call the base 10 system or decimal system because back in grade school or the like, you learned to count and add and subtract numbers by way of columns.

但是，在座的每一位可能都记得,这在小学的时候学的,以10为进制的系统或者十进制系统,通过数列方式学习数数和加减法。

哈佛公开课 - 计算机科学课程节选