改错：could you show your maths book for me?the invent helped p
改错：could you show your maths book for me?the invent helped people write in big numbers
what other can a modern electronic calculator do?
my friends sometime send me e-mails
don't laugh on the poor people
can you help other?
what other can a modern electronic calculator do?
my friends sometime send me e-mails
don't laugh on the poor people
can you help other?
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你能帮帮他们吗