You don't need any special skills for this job, just plain common sense.

这项工作不需要任何特殊技能，只要有普通常识就够了。

《牛津词典》

It is just plain common sense.

这是非常普遍的道理。

youdao

To cure his patients, he relied on a palette of remedies that included modern science, folk medicine and plain common sense.

为了治愈他的病人，他采用了一系列的治疗措施，其中包括现代科学治理，民间医疗和一些普通常识。

youdao

Still, there are areas where a multilateral approach is plain common sense and works to level the playing field with regards to global trade.

FORBES: Navigating The World's Trade Winds

Has he merely delayed a move long backed by many Democrats as plain common sense so he can deploy it to maximum effect, months away from an election?

BBC: Immigration makes election bow

When Jason Austin, a 29-year-old IT professional, was skeptical of a potential date he'd met online, he did what anyone who's seen an episode of "Catfish" (or just has plain common sense) would do: He turned to Facebook.

CNN: How technology has changed romance