fēixiāngduìlùnxìng
ㄈㄟ ㄒㄧㄤ ㄉㄨㄟˋ ㄌㄨㄣˋ ㄒㄧㄥˋ
Simplified 非相对论性
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 非相對論性 and it comes back until you know it.