tóngliàngyìwèisù
ㄊㄨㄥˊ ㄌㄧㄤˋ ㄧˋ ㄨㄟˋ ㄙㄨˋ
Simplified 同量异位素
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 同量異位素 and it comes back until you know it.