據說小学生几秒就做出；高中生几分钟；大学生半小时以上；博士可能要一辈子......

What takes an elementary school student just seconds to do;

takes a high school student several minutes;

takes a college student half and hour and up;

and takes a Ph.D a lifetime…

請看題：

the question is:

來源: chinasmack

from: chinasmack

答案：

answer:

倒過來看看:)

look at it upside-down :)