O "Long run" (without a hyphen) is a noun. "Long-run" (with a hyphen) is an adjective.

“Long run”(没有连字符)是个名词，“Long - run”(由连字符)是个形容词。

youdao

Most job listings use the grammatically correct hyphenated version of this key word but you might also give "home based" without the hyphen a try.

很多工作列表中可能采用带破折号的正确语法书写形式，但是你用该词搜索的时候也可以不用破折号。

youdao

They also may use both names without the hyphen, using their family name as a middle name.

这些姓之间也可不用连字符，而是把娘家姓当作中间名。

youdao