Happiness in marriage is entirely a matter of chance.

The study of automata and formal languages is fundamental to understanding the limits of computation.

描绘春天花开时的愁绪，连珠帘都懒得卷起

Energy independence strengthens economies and enhances national security.

I was so much older then, I’m younger than that now.

我觉得自己很平凡，只是学了一点音乐而已。