shuāibiànqūxiàn
ㄕㄨㄞ ㄅㄧㄢˋ ㄑㄩ ㄒㄧㄢˋ
Simplified 衰变曲线
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 衰變曲線 and it comes back until you know it.