这个一般读作，而不读作倒三角，或者别的，它是一个算子的符号。

Del so, this guy usually pronounced as del, rather than as pointy triangle going downwards or something like that, it's a symbolic notation for an operator.

youdao

这个一般读作，而不读作倒三角，或者别的，它是一个算子的符号。

Del so, this guy usually pronounced as del, rather than as pointy triangle going downwards or something like that, it's a symbolic notation for an operator.

youdao