The companies have the technical tools to stop the recirculation of abuse imagery by matching newly detected images against databases of the material.

这些企业原本拥有匹配新检测到的图像与材料数据库这一技术手段，能够停止侵害儿童的图像反复传播。

When the diesel is really running cleanly, it's not as efficient because there's a lot of recirculation of the exhaust gases and a lot going on.

使用清洁柴油以后不像以前那样高效了，因为要进行废气再循环和其他过程。