What we learn from history is that people don't learn from history.
The anarchic nature of the international system means that states must rely on self-help to ensure their survival.
The night is young, and so am I.
以往花费许多力量也不能推动它，今天在水中间却能自在地移动。
Passion is the fuel that drives innovation and success.
Time is a slippery thing: lose hold of it once, and its string might sail out of your hands forever.