條件作用原理同樣適用于所有物種。
經(jīng)濟政策中的規(guī)則而非自由裁量權(quán)有助于避免短期政治壓力的陷阱。
The only person you are destined to become is the person you decide to be.
歷史是人類的集體記憶。
You don't have to have a reason to love somebody.