It's not what you're looking for trouble, but something that you're not sure of, but in fact, it's not.

The past is always changing, because we are always changing our relationship to it.

我不是为大众做音乐，我是为自己做音乐。

The stock market is a device for transferring money from the impatient to the patient.

"Memory is a tricky thing; it can be both a blessing and a curse."

The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.

乌鸦般的交情，虽然看上去挺好，但实则不亲密；绳子结在一起，虽然看上去牢固，但能轻易解开。