生活中的每一个挑战都是成长和变得更强大的机会。
中国的崛起和俄罗斯的复兴挑战了自由民主是唯一可行的政府形式的观念。
The human body is the most complex puzzle, and medicine is our way of solving it.
There are no hard distinctions between what is real and what is unreal, nor between what is true and what is false.