闲时不烧香，急时抱佛脚。国乱思良将，家贫思贤妻。
在空闲的时候不做准备，危急的时候却临时抱佛脚。国家发生战乱时，才想到有名的将领；家庭贫困时才希望能有个贤惠的妻子。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
The key to fighting poverty is to break it down into smaller, more manageable problems.
The center of our galaxy is a fascinating place where extreme physics takes place, and it's a privilege to study it.