人分这么几种：不认识，认识，熟人，朋友，知心朋友。朋友不在当面表白，而是背后说起朋友的时候，是否提到过你。
People can be divided into these types: strangers, acquaintances, familiar people, friends, and close friends. True friendship isn't about compliments to your face, but whether you're mentioned when they talk about friends behind your back.
真正的幸福来自于对自己和他人的爱。
"Integrity is the cornerstone of all business success."
The real reward of science is the thrill of understanding something new.
The doorway to happiness opens from the inside.
声音可以像任何物理结构一样塑造空间。