Collaboration in mathematics is essential; no one can solve all the problems alone.
The value of unpaid work is often invisible in economic measures, yet it is the backbone of society.
无偿工作的价值在经济衡量中常常不可见，但它却是社会的支柱。
投资研发就是投资未来，这一点我们从不犹豫。
The only way to write well is to write badly first.
物理学的美丽在于它能够用几个简单的原理解释宇宙。
