Complex sentence: The term assumes a widescreen aspect ratio of (a rectangular TV that is wider than it is tall), a spatial resolution of 1920 pixels × 1080 lines (2.1 megapixels), and a temporal resolution of 50 or 60 interlaced fields per second.
Split into simpler sentences: The term assumes a widescreen aspect ratio of (a rectangular TV that is wider than it is tall), a spatial resolution of 1920 pixels × 1080 lines. A 1920 pixels × 1080 lines screen has a total of 2.1 megapixels and a temporal resolution of 50 or 60 interlaced fields per second.