But penetrating a site 's defenses can be tough .

但穿透网站的防火却可能很难。

Globe rupture can occur secondary to blunt or penetrating trauma .

眼球破裂可继发于钝挫伤或穿透性损伤。

Normally , viruses have a hard time penetrating the dense layers of a biofilm .

通常病毒很难穿透稠密的生物膜。

Penetrating networks to damage them is not much harder .

经由网络渗透来搞破坏也不算太难。

A faraday cage is a shield of conductive material that stops electromagnetic radiation penetrating .

法拉第笼是一种用导电材料制成阻止电磁辐射贯穿的屏蔽体。