And even if an attack succeeded in penetrating all of Iran's underground sites-a big if-it could do no more than set back Iran's ambitions temporarily.

并且即使突袭能成功地渗入伊朗所有地下核设施—一个大胆的假设—也仅仅是暂时遏制住伊朗的核野心。

youdao

Two weeks later, four more would-be bombers tried, but failed to attack underground trains.

VOA: standard.2010.04.01

Here, counterproliferation capabilities such as improved passive defenses, as well as counterforce means such as deep underground attack weapons, play a central role in deterrence.

CENTERFORSECURITYPOLICY: Summary of the Center for Security Policy's High-l

And then there's the danger, as Hamm sees it, of federal regulation of fracking, which has come under attack for supposedly polluting underground water supplies.

FORBES: Focus

At the time, the Libyans claimed that it was so strong, so deep underground, it could withstand an aerial attack, a bombing attack.

CNN: Starr: Libya has scientific expertise on WMD