By 2010, college graduates, if you said two circles followed by a semicircle, two sixteens followed by what, they would say eight, because eight is half of 16.
到 2010 年，如果你问大学毕业生， 两个圆排在一个半圆之后， 两个十六岁跟在什么之后呢？ 他们说8，因为8是 16 的一半。