信用卡大约在二十年前首次出现。

Credit CARDS first appeared about 20 years ago.

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大约在二十年前，他曾经在与人枪战时手臂中弹，这颗子弹严重困扰着他的身体，有时他的手臂都不能动。

He had received the wound during a gun fight with another man about twenty years earlier. It troubled him so badly that sometimes he could not use the arm.

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