The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.
真正现代的唯一方式是成为后现代的。
"The challenge is to make a movie that is both visually stunning and emotionally engaging."
办丧事虽有一定的礼仪,但还是以哀痛为本。
The most reliable way to anticipate the future is by understanding the present.