七加九等于几？

What's seven plus nine?

youdao

曾有个笑话，商人问会计2加2等于几？

HEARD the joke about a businessman who asks his accountant what two plus two is?

youdao

沃兹先生：“威廉，负1乘负1等于几？”

Mr. Ward: "William, negative 1 multiplied by negative 1?"

youdao

For an angular node, we're just talking about what the l value is, so whatever l is equal to is equal to the number of angular nodes you have.

对于角向节点，我们其实就是在讨论l，的值是多少，因此不管，l，的值等于几,它就等于你所有的角向节点的数目。

麻省理工公开课 - 化学原理课程节选

For an f orbital, what is the quantum number l equal to?

对于一个，f，轨道，它的角量子数，l，等于几？

麻省理工公开课 - 化学原理课程节选