"The critical part at the end of whatever the level of study you are going to do is to get yourself involved in something that puts you into a laboratory."

VOA: standard.2010.05.10

Middle east oil is critical to the rise of India and China, and in that sense it's very much part of the economic process.

中东石油,对于中印的崛起非常关键，因此它是东南亚经济发展的,重大保障。

普林斯顿公开课 - 国际座谈会课程节选

The president spoke of Turkey as a critical ally and an important part of Europe.

VOA: standard.2009.04.06

"Prevention of HIV among young people is of critical importance in this country where a large part of the population is young, and where sexual relations start very early and they are not protected.

VOA: standard.2009.04.24

This part of the Illinois River near Morris is several miles southwest of the electronic fish barrier, a critical point along the Illinois waterway system meant to stop the Asian Carp from reaching Lake Michigan.

VOA: standard.2010.07.19