However, punchcards were slow and write-once, you can't easily un-punch a hole.
然而，打孔卡速度很慢，而且是一次写入，你不能轻易地取消打孔。
Punchcards
原声例句
科技 Crash Course
科技 Crash Course
The 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.
主程序存储在 62,500 张穿孔卡片上，大约相当于 5 兆字节的数据，这是当今智能手机照片的平均大小。
中文百科
打孔卡 Punched card
（重定向自Punchcards）
![霍列瑞斯式的打孔机(pantograph)，用于1890年的人口普查[1].](/uploads/202502/05/CTR_census_machine3058.JPG)
打孔卡又称穿孔卡、霍列瑞斯式卡（Herman Hollerith）或IBM卡，是一块纸板，在预先知道的位置利用打洞与不打洞来表示数字消息。现在几乎是一个过时的存储器，但其设计转变成现今常用于考试及彩券投注等用途的光学划记符号辨识卡片。
英语百科
Punched card 打孔卡
（重定向自Punchcards）
![Hollerith card as shown in the Railroad Gazette in 1895.[16]](/uploads/202502/05/Hollerith_punched_card3059.jpg)
A punched card or punch card is a piece of stiff paper that contains digital information represented by the presence or absence of holes in predefined positions. The information might be data for data processing applications or, in earlier examples, used to directly controlling automated machinery. The terms IBM card, or Hollerith card specifically refer to punched cards used in semiautomatic data processing.
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- from tip to tip的意思
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