让孩子留在家里最好的方法是让家庭氛围愉快——并且把轮胎的气放掉。
The laws of physics are the language of the universe, and through them, we can begin to comprehend the vastness and complexity of all that exists.
成功不是终点,失败也不是致命的:重要的是继续前进的勇气。