France has carried out another underground nuclear test in the South Pacific.

法国在南太平洋进行了另一次地下核试验。

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The treaty bans underground nuclear test.

那条约禁止地下核试验。

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Then, in February, it carried out an underground nuclear test.

随后，2月份，他们进行了地下核试验。

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For weeks, South Korean officials delayed expected announcements it would join, but experts say they had no other choice after Monday's underground nuclear weapons test by the North.

VOA: standard.2009.05.26

The latest North Korean underground nuclear test represents both a danger and an opportunity.

CENTERFORSECURITYPOLICY: Center for Security Policy | Note to Congress: Twenty Experts Ask President Obama to Reverse Course on Nuclear Cuts

Unlike North Korea, it could not conduct an underground nuclear test anytime soon.

CENTERFORSECURITYPOLICY: Broken treaty

Because there was no artificial seismic activity at the time, Seoul ruled out a third North Korean underground nuclear test.

FORBES: New Asia