理想情况下，三角形将是一个伪元素，但不幸的是它现在是一个span。

Ideally, the triangle would be a pseudo element as well, but unfortunately it's a.

youdao

理想情况下，三角形将是一个伪元素，但不幸的是它现在是一个span。

Ideally, the triangle would be a pseudo element as well, but unfortunately it's a.

youdao