You haven't read it wrong, but we've decided to have that rule only apply inside arenas.

我们决定，这项修改将仅仅在竞技场内生效。

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Inside those arenas the key to building the next generation of tiny chips is a technique known as immersion lithography.

FORBES: Magazine Article

Along the way, officially-sanctioned buskers and street entertainers are on hand to amuse the crowds, and music pumps from speakers -- though it can't drown out the cheers of fans inside the arenas.

CNN: Park life: Games leave London with a happy golden glow