He said if these efforts were not stopped, the North some day would be powerful enough to change the Constitution and end slavery everywhere.

VOA: special.2009.03.26

In particular, all languages, at minimum, are powerful enough to convey an abstract notion like this; abstract in the sense that it talks about thoughts and it talks about a proposition and spatial relations in objects.

尤其是所有的语言都至少,能够有效地表达抽象概念,在某种意义上来说,抽象概念能够表达思想,能够表述物体的位置与空间关系

耶鲁公开课 - 心理学导论课程节选

The researchers say their findings support the idea that a huge explosion or explosions caused fire and pressure powerful enough to kill off life on the Earth.

VOA: special.2009.01.20

Fewer than before, but still enough to make it a powerful force.

VOA: special.2009.11.26