Sometimes you need to group sub-expressions with parenthesis, but don't want the parenthesis to spit out another marked sub-expression, in this case a non-marking parenthesis ?

有些时候你需要使用圆括号对子表达式分组，但是却不想这个括号里面的内容再作为标示子表达式，在这种情况下可使用非标示圆括号？

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Durable, non-marking carbon rubber outsole.

坚固耐用，不脱色碳橡胶外底。

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Gum rubber outsole with non-marking rubber traction pods.

橡胶外底胶不脱色橡胶牵引吊舱。

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In 2010, Chavez declared then-Ambassador Patrick Duddy persona non grata, marking the last time that the US had an ambassadorial presence in Venezuela (but not the last time the two countries have expelled diplomatic personnel).

BBC: Viewpoint: New era for US-Venezuela relations?

The contoured sides are interrupted only by the volume rocker and non-MHL micro-USB port, hewing to the simple aesthetic marking the rest of the One series.

ENGADGET: HTC One V review Mobile

It was a feat Morgan and his crew would repeat across the industrial landscape, arranging new equilibrium conditions and regulatory mechanisms in one sector after the other, filling in for a non-existent central banking function (the Federal Reserve was created in 1913, marking the start of a whole new story).

FORBES: Entrepreneurs are the New Labor: Part I