yàngtiáohánshù
ㄧㄤˋ ㄊㄧㄠˊ ㄏㄢˊ ㄕㄨˋ
Simplified 样条函数
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 樣條函數 and it comes back until you know it.