而HARWELL计算机则完全没有这方面的问题，记得有一次这台机器连续自动运算了10天之久，从圣诞节一直算到新年假期结束为止。
The machine once ran for ten days unattended over a Christmas and New Year holiday period.
孩子们应该在三年级能够进行加、减法运算，在五年级结束时能够进行乘、除法运算。
Children should be able to add and subtract in the third grade. By the end of fifth grade, they should be able to multiply and divide.
说明：用STL实现简单运算表达式，其中包括加减乘除等，以输入等号为结束标志。
Simple arithmetic expressions, including addition, subtraction, etc. , to enter an equal sign marks the end of the STL.
说明：用STL实现简单运算表达式，其中包括加减乘除等，以输入等号为结束标志。
Simple arithmetic expressions, including addition, subtraction, etc. , to enter an equal sign marks the end of the STL.
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