More painful sanctions, then, are the only sensible alternative to leaving Iran to enrich its way to the dangerous point where it can declare it has a bomb.

与其让伊朗继续其浓缩铀之路，直到宣称研制出核弹，那么更多痛苦的制裁则是唯一明智的选择了。

youdao

The challenge of achieving a 450 ppm target -- the point at which NASA scientists believe dangerous warming could be triggered -- will be far harder.

实现更具挑战性的445PPM的大气二氧化碳浓度（这一浓度NASA科学家相信可引发危险的变暖）将困难。

youdao

People can easily see the point of a system that warns the driver about dangerous situations.

人们很容易就能明白警告驾驶者关于威险情况的系统的重要。

youdao

The hearings should have been more substantive because the United States is at a dangerous inflection point in North Africa and the Sahel region to its south, and leaders in both parties need to think carefully about how deeply we want to get involved in this volatile part of the world.

CNN: In N. Africa terror battle, U.S. should lead from way behind

Where it gets dangerous is the point at which investors believe they can take more risk than they actually can.

FORBES: Risk: Are You Willing?

The challenge of achieving a 450 ppm target -- the point at which NASA scientists believe dangerous warming could be triggered -- will be far harder.

CNN: Report urges fuel revolution