And since then there been at least 2 iterations of further stop gap measures, first European community adopted and then American are doing much the training.

至少有两次想要控制差距的措施，一个是欧盟采用的,然后美国也在作相似的训练工作。

普林斯顿公开课 - 国际座谈会课程节选

And since then there been at least 2 iterations of further stop gap measures, first European community adopted and then American are doing much the training.

至少有两次想要控制差距的措施，一个是欧盟采用的,然后美国也在作相似的训练工作。

普林斯顿公开课 - 国际座谈会课程节选