我總是等機會錯過了才發(fā)現我曾有過機會。
此一時，彼一時也，怎么能一概而論呢？
社會系統是個人之間以及群體之間關系的系統。
It is our mission as scientists of this generation to ensure Chinese people have enough to eat.
"The task of the writer is to make the invisible visible."
Abstraction is the key to managing complexity in software systems.