We 're right at a cusp of change in media and technology .

我们现在正处于媒体与技术变革的前沿。

America is on the cusp of a sea change , " he says . "

他说：“美国即将经历巨变。

But here the city stands uncomfortably , on the cusp of history again .

但是，不论怎么说，伦敦金融城再次被尴尬地置于历史的风口浪尖下了。

It is on the cusp of something dynamic and exciting , " wong says . "

“它的东西是动态的和令人兴奋的风口浪尖，”王说。

Cusp catastrophe model of instability of pillar in asymmetric mining .

非对称开采时矿柱失稳的尖点突变模型。