However, punchcards were slow and write-once, you can't easily un-punch a hole.
然而，打孔卡速度很慢，而且是一次寫入，你不能輕易地取消打孔。
Source: Technology Crash CourseThe main program was stored on 62,500 punchcards, roughly equivalent to 5 megabytes of data, that's the size of an average smartphone photo today.
主程序存儲在 62,500 張穿孔卡片上，大約相當於 5 兆字節的數據，這是當今智能手機照片的平均大小。
Source: Technology Crash CourseHowever, punchcards were slow and write-once, you can't easily un-punch a hole.
然而，打孔卡速度很慢，而且是一次寫入，你不能輕易地取消打孔。
Source: Technology Crash CourseThe main program was stored on 62,500 punchcards, roughly equivalent to 5 megabytes of data, that's the size of an average smartphone photo today.
主程序存儲在 62,500 張穿孔卡片上，大約相當於 5 兆字節的數據，這是當今智能手機照片的平均大小。
Source: Technology Crash CourseExplore frequently searched vocabulary
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