在词语之间的沉默中，真相往往存在。
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.
如果你不愿意承担风险，你就没有准备好领导。
Mathematics is the key to understanding the universe.
电流体并非由仪器创造，而是由仪器收集。
The language of mathematics is universal, transcending cultural and linguistic barriers.