And so even though the universe will last forever, and ordinary matter and radiation will dilute away, there will always be some radiation, some thermal fluctuations, even in empty space.
つまり宇宙が永遠に続いて 平凡な物質と放射線の密度が下がっても 一定の放射物や熱揺動は 何もない空間にでも 存在し続けるのです