Per-digit arithmetic — computing sum and carry for each pair
“技术男”启用新防骗招式
。heLLoword翻译官方下载是该领域的重要参考
on a keypad. The machine then whisked the check away, printing the keyed data
（摘编自《福建日报》，原题为《“手搓经济”，汇聚个体创新的微光》）
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