obstacle是什么意思？

Steering through change and facing obstacles brings us face to face with our fears.

Increasing water shortages prove to be the biggest obstacle to boosting the world's grain production.

Time, I realize, is the biggest obstacle to cooking for most people.

time, I realize, is the biggest obstacle to cooking for most people.

Beyond the Antarctic treaties, huge obstacles persist to tapping these resources, like drifting icebergs that could jeopardise offshore platforms.

Antarctica's harsh natural conditions constitute huge obstacles to the exploitation of its resources.

To make matters worse, these schools are ill-equipped to graduate these students— young adults who face specific challenges and obstacles.

The biggest obstacle to energy transition is that the present energy system is too expensive to replace.

It is the biggest obstacle to social mobility.

The Uses of Difficulty The brain likes a challenge—and putting a few obstacles in its way may well boost its creativity

We tend to equate（等同于）happiness with freedom, but, as the psychotherapist and writer Adam Phillips has observed, without obstacles to our desires it's harder to know what we want, or where we're heading

Obstacles are everywhere disappearing.

Few of us wish to turn the clock back, but perhaps we need to remind ourselves how useful the right obstacles can be

Obstacles deliberately placed in the creation of music contribute to its success.

Maybe we need to bear in bear in mind that the right obstacles help lead us to greater achievements

Huge obstacles It could, of course, also be that Obama's success helps people to forget that a disproportionate number of black Americans still live in poverty and face huge obstacles when trying to overcome these circumstances

blacks still face obstacles in political participation