You may not be able to alter reality, but you can alter your attitude towards it.
可持续性不再是可选项;对于任何想在21世纪蓬勃发展的企业来说,它都是必需品。
Mathematics is not a spectator sport; to understand it, one must engage with it actively.
在学习结束时,我们知道物理学的所有过去,但对现在和未来一无所知。