- NEW新增
Translate with your own API key. Bring a key from DeepSeek, Gemini, DeepL, Alibaba Bailian and a dozen more. Each sentence is understood as a whole and then split back across the subtitles, so the translation line turns over with the original instead of standing still. The key is stored on this computer only and is sent to nobody but the provider you picked.
可以用你自己的 API Key 翻译了。支持 DeepSeek、Gemini、DeepL、阿里百炼等十余家。译文会整句理解之后再按字幕切回来，不再一整句杵在那儿不动。Key 只存在这台电脑上，除了你选的那家服务商，不会发往任何地方。
- NEW新增
Export a whole video through your own engine. The SRT download can go through your provider instead of YouTube™'s free translation. It says how many requests it will take before it starts, shows progress, and can be stopped — and it is off by default, because it spends your quota and sends the whole track.
导出整片字幕也能走自带引擎。下载 SRT 时可以用你自己的服务商翻译，而不是 YouTube™ 的免费整轨翻译。开始前会先告诉你大约几次请求，中途有进度、可以停；默认关闭，因为它会消耗你的额度、而且整片字幕会离开浏览器。
- NEW新增
Fifty target languages, and you choose which ones show. The popup menu lists the ones you keep; the rest are one click away in Settings → Subtitle languages.
目标语言增加到 50 种，显示哪些由你决定。弹窗下拉只列你留下的，其余的在「设置 → 字幕语言」里随时加回来。
- NEW新增
A settings page, reachable from the gear. Getting started, translation service setup and About now live there. Seven more fonts, including a Chinese serif and a rounded face.
齿轮里有了独立设置页。新手入门、翻译服务配置和「关于」都在里面。字体新增 7 种，含中文宋体与圆体。
- IMPROVED改进
Everything reads bigger. The smallest text went from 10.5px to 13px and nothing is under 12px any more.
整体字号调大。最小的一档从 10.5px 提到 13px，全部文字不再低于 12px。
- FIXED修复
Subtitles dragged to the very bottom are no longer clipped, and a tab restored after a browser restart shows subtitles again without touching the CC button.
字幕拖到最底部不再被裁掉半行；关掉浏览器再打开、恢复出来的标签页也不用手动开关 CC 就能出字幕。
- FIXED修复
Shorts turn their captions on by themselves now, and much sooner. A short has no CC button to press, so if your captions were switched off, nothing happened at all; now the track is asked for as soon as the player can answer — including the ones that used to stay blank until you swiped past them and came back.
Shorts 现在会自己把字幕打开，而且快得多。短视频里没有 CC 按钮可点，所以此前只要你的字幕开关是关的，就一直是空白；现在播放器一能应答就去要字幕轨——快速连划时那些「划过去再划回来才出字幕」的短视频也一并修好了。
- FIXED修复
The automatic engine falls back to per-sentence translation far less often. One failed request used to keep a whole video on the fallback until you changed the engine by hand; it now tries again on its own. Speaker markers from auto-generated captions (>>) no longer show up in either line.
「自动」引擎不再动不动就整场退回逐句翻译。此前只要有一次请求失败，整支视频就会一直停在退路上，除非你手动切引擎；现在它会自己再试。自动字幕里的换人说话标记（>>）也不会再出现在字幕里了。
- FIXED修复
Updating the extension no longer leaves a dead subtitle box behind in tabs that were already open — the old box now steps aside, and reloading the tab brings the new one.
更新扩展后，已经开着的标签页不会再留下一个不再翻译的字幕框——旧的会自己退场，刷新一下就是新的。
- FIXED修复
No more twin lines on same-language videos. When the caption track already speaks your target language (e.g. a Chinese video with a Chinese target), the overlay now shows a single line — the popup notes "already in your target language". Simplified ↔ Traditional conversion still translates as before.
同语言视频不再显示两行一样的字幕。字幕轨本来就是目标语言时（比如中文视频+中文目标），只显示一行，弹窗会注明"已是目标语言，无需翻译"。简体↔繁体转换不受影响，照常工作。
- FIXED修复
Echo-proof everywhere. A "translation" identical to the original is never painted as a second line on any path — including exported SRT files, where identical pairs collapse to one line.
全链路防回声。与原文完全相同的"译文"在任何路径下都不再重复显示，导出的 SRT 里相同的两行也会合并为一行。
- FIXED修复
Cleaner caption-track switches. Changing the CC language mid-video no longer reuses translations cached for the previous track.
切换字幕轨更干净。视频中途更换 CC 语言后，不再误用上一条字幕轨的翻译缓存。
- NEW
YouTube Shorts support. Bilingual subtitles now work on the vertical player too — swipe to the next Short and the captions keep up, positioned clear of the Shorts title area.
支持 YouTube Shorts。竖屏短视频也有双语字幕了——快速滑动切换下一条，字幕即时跟上，位置自动避开 Shorts 标题区。
- NEW
Update notes, the polite way. A small "NEW" badge on the icon after minor updates; this page opens only for feature releases — turn it off anytime in the popup.
更新提醒（不打扰版）。小更新只在图标上挂个 NEW 角标；只有功能版本才会打开这个页面，且可随时在弹窗里关掉。
- IMPROVED改进
The overlay steps aside for the progress bar while the player controls are visible — dragged positions included — and settles back once they hide.
字幕自动避让进度条：播放器控件出现时整体上移（拖动过的自定义位置同样生效），控件隐藏后平滑落回。
- FIXED修复
AI-dubbed videos: a one-time notice when a video only has dub captions (no original-language track); if an original-language track exists, the extension switches to it automatically.
AI 配音视频：只有配音字幕（无原声轨）的视频会提示一次；存在原声字幕轨时自动切换过去。
- NEW
Smart sentence mode. When a track can't be translated by YouTube, fragmented auto-captions are first rebuilt into full sentences, then translated — much more natural results.
智能整句翻译。当整轨翻译不可用时，先把碎片化的自动字幕重组成完整句子再翻译，译文自然得多。
- NEW
Auto engine. Picks the best available engine per video and falls back gracefully; you can still pin one manually.
自动引擎。按视频自动选择最佳翻译方式并平滑降级，也可以手动固定某一种。
- IMPROVED改进
Sturdier under rate limits: request queue with backoff, retry for half-translated lines, "…" placeholder instead of mismatched lines.
限流下更稳：请求队列+退避重试、半翻句自动补翻、用"…"占位替代错位配对。
- NEW
New name: Dual Subtitles for YouTube™, plus a full privacy policy and in-popup disclaimer.
更名为 Dual Subtitles for YouTube™，并新增完整隐私政策与弹窗免责声明。
- FIXED修复
Captions now auto-enable when you open a video directly from the address bar (cold load).
冷加载不自动开字幕：从地址栏直接打开视频时也会自动开启 CC。
- NEW
SRT export — save the original, the translation, or both as a subtitle file.
SRT 字幕导出——原文、译文或双语，一键存成字幕文件。
- FIXED修复
Drag handle no longer lingers in fullscreen when player controls hide.
全屏拖动手柄在播放器控件隐藏后不消失的问题。