The mind is a biological problem-solving device.
心理现象只能通过它们对行动的后果来理解。
She realized that sometimes, the hardest thing to do is to let go.
"We are all just walking each other home."
石油和天然气在未来几十年仍将是能源结构的一部分,但我们必须尽可能清洁地生产它们。