我们正处在欧洲关系新时代的门槛上。

We're ___on ___the ___threshold ___of a new era in European relations.

处在第三个千年的门槛上，进步无法阻挡。

On ___the ___threshold ___of the third millennium, there is no stopping progress.

这家公司正处在行业革命性变革的门槛上。

The company stands ___on ___the ___threshold ___of revolutionary changes in its industry.