In mathematics, truth is always relative to the system you're working in.
安全不是优先事项,而是价值观。优先事项会变,价值观不会。
Mathematics is a living, breathing discipline, constantly evolving with new ideas.
音乐是我的生命,我每天都在过这样的生活。
The properties of the whole are not deducible from the properties of the parts.