Unfortunately, when you make a DVD, it's borders will most likely be cut too, and if the video had subtitles too close to the bottom, they won't be fully shown.
遗憾的是，当你制作 DVD 时，它的边框很可能也会被裁剪掉，而且如果视频中的字幕太靠近底部，那么字幕也会显示不完整。