生命中令人悲伤的一件事是你遇到了一个对你来说很重要的人，但却最终发现你们有缘无份，因此你不得不放手。
A sad thing in life is when you meet someone who means a lot to you only to find out in the end that it was never meant to be and you just have to let go.
长时间坐着同一个地方，砖头都会被踩穿，比喻持之以恒的努力！这坚持不懈的精神，太励志了！并且只有持之以恒的努力，才能成就非凡的事业！
"The study of mind must be grounded in biology."