The causal approach is about understanding the mechanisms that generate the data.
表演是探索人类状况和更好地理解他人的一种方式。
Happy the man, and happy he alone, he who can call today his own.
创新是能源行业的命脉；没有它，我们就会停滞不前。
Society can and does execute its own mandates， and if it issues wrong mandates instead of right， or any mandates at all in things with which it ought not to meddle， it practices a social tyranny more formidable than many kinds of political oppression， since， though not usually upheld by such extreme penalties， it leaves fewer means of escape， penetrating much more deeply into the details of life， and enslaving the soul itself.