"The immune system is the key to fighting cancer."
免疫系统是抗击癌症的关键。
诗歌是一个可以说出不可言说之事的地方。
The energy sector is evolving, and so must we—adaptation is key to survival.
常识告诉我们,业绩来来去去,但成本永远存在。
The world is a prison in which solitary confinement is preferable.