SUBSTITUTE(text, old, new [,num])
SUBSTITUTE Ͷúغú @old ɺ @new @text. 広Ͷúضöɶ̶ ʺ̶ͶöɺúѺк @num-Ƕͺ ʶ кӶúѺ նǺ¶öɶ̺ @old @text, úжȶ ɶ 溧ɶ, Ѷ ͶöɺúѺк ¶Ƕ նǺ¶öɶ̶.
Ѻ Ժɺ̺ жǶͶúкѶ̶ͺ Excel.
SUBSTITUTE("testing testing","test","wait",2) equals "testing waiting".
REPLACE, TRIM.