delta plus 变种都出来了，这是怕希腊字母不够用了准备每个字母后边加符号了？

My bet is that smart money is on the upcoming 'Delta Cubed' variant to be the one that will finally convince all the dumb rubes out in flyover country to submit.
https://cbsloc.al/3CoFW1G

还可以用delta++