Quality should never be compromised, no matter the cost.

The anarchic nature of the international system compels states to prioritize their own survival above all else.

The end of all our exploring will be to arrive where we started and know the place for the first time.

I think the key to a good performance is to be able to listen and react truthfully.

登山不论遇到什么艰难险阻都不停止脚步，就一定能够登上山顶。