The rise of China and the resurgence of Russia have challenged the idea that liberal democracy is the only viable form of government.
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。
"Silence is as important as the words we speak."
小麦育种不仅要高产,还要抗病抗逆。
实验室的失败不是终点,它只是另一个数据点。
The United States is the most powerful country in the world, and it will remain so for the foreseeable future.