But negotiations broke down last year over Pyongyang's refusal to accept a verification plan for the declaration it made of it nuclear holdings and activities.

VOA: standard.2009.11.11

And we pay a very high price for this inability, for this refusal to accept the fact that it is part of human nature that is constrained, that is there no matter what.

我们为这种无能付出高昂代价，为拒绝接受,本性受约束，生而有之的事实，付出高昂代价。

哈佛公开课 - 幸福课课程节选

But negotiations have been stalled for months over Pyongyang's refusal to accept a verification program for the declaration of its nuclear holdings and activities it made last June.

VOA: standard.2009.03.25

But the six-party talks have stalled over Pyongyang's refusal to accept a verification program for the declaration of its nuclear assets and activities that was agreed to last June.

VOA: standard.2009.04.14