Smoking dulls our brains and weakens our body .

吸烟能使大脑迟钝，身体虚弱。

Choice , in other words , dulls the critical faculties .

换言之，太多选择会钝化人的批判思维。

But eventually the mind slows , the arteries clog , the ability to deal with new challenges dulls .

但是最终头脑会变得迟钝，动脉会阻塞，处理各种新挑战的能力也会减弱。

But I don 't like it very much . You just take pictures without conscious thought . It dulls our senses .

我才不喜欢。那样照相完全不用思考了，会让我们感觉麻木的。

Watching television dulls one 's wits .

看电视能使人头脑迟钝。