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🎯 随机行抽取器（从文本中随机抽行）Random Line Picker
从粘贴的多行文本中随机抽取若干行：可去除空行、抽取时不重复、保持原文顺序或按抽取顺序显示。适合从名单、题库、清单里随机选取，或做抽样。数据在本地处理。Pick random lines from pasted multi-line text — optionally drop blank lines, pick without repeats, and show the picks in their original order or in draw order. Great for choosing at random from a roster, question bank or list, or for sampling. Processed locally.
使用说明与常见问题How-to & FAQ
「随机行抽取器（从文本中随机抽行）」是什么？What is the Random Line Picker tool?
从粘贴的多行文本中随机抽取若干行：可去除空行、抽取时不重复、保持原文顺序或按抽取顺序显示。适合从名单、题库、清单里随机选取，或做抽样。数据在本地处理。Pick random lines from pasted multi-line text — optionally drop blank lines, pick without repeats, and show the picks in their original order or in draw order. Great for choosing at random from a roster, question bank or list, or for sampling. Processed locally.
如何使用「随机行抽取器（从文本中随机抽行）」？How do I use the Random Line Picker tool?
在「随机行抽取器（从文本中随机抽行）」中，按需设置「抽取数量」等选项，然后点击「抽取」、「复制」按钮即可。In the Random Line Picker: Set "How many", then click "Pick", "Copy".
“不重复”是什么意思？What does No repeats mean?
勾选后，一次抽取中同一行不会被选到两次，所以抽取数量不能超过总行数；取消勾选则每次独立抽取，可能抽到重复的行，适合做可放回抽样。With it ticked, no line is picked twice in one draw, so the count cannot exceed the number of lines. Untick it to draw independently each time (lines may repeat), which suits sampling with replacement.
“保持原文顺序”和“按抽取顺序”有什么区别？Original order vs draw order?
“保持原文顺序”按这些行在原文里的先后排列结果；默认（不勾选）按它们被抽中的随机顺序显示。两者抽到的行相同，只是排列不同。Keep original order lists the picks in the order they appear in your text; by default they appear in the random order they were drawn. The same lines are picked either way — only the ordering differs.
空行会被抽到吗？Can blank lines be picked?
默认勾选“忽略空行”，空白行不会参与抽取；取消勾选后空行也算作可抽取的行。行内容会原样保留，不做去除首尾空格处理。By default Skip blank lines is ticked, so empty lines are excluded; untick it to include them. Line contents are kept exactly, with no trimming.
数据会上传吗？Is my text uploaded?
不会。抽取完全在你的浏览器里完成，文本不会发送到任何服务器。No. The pick runs entirely in your browser and the text is never sent anywhere.
随机结果真的随机吗？Is the randomness truly random?
「随机行抽取器（从文本中随机抽行）」使用浏览器的 crypto.getRandomValues（密码学安全随机数）生成结果，并做了无偏处理，每个结果出现的概率相同。The Random Line Picker uses crypto.getRandomValues (cryptographically secure randomness) with unbiased sampling, so every outcome is equally likely.
「随机行抽取器（从文本中随机抽行）」免费吗？需要注册吗？Is the Random Line Picker free? Do I need an account?
「随机行抽取器（从文本中随机抽行）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Random Line Picker is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.