When a professor insists computer science is X but not Y, have compassion for his graduate students.
当教授坚持说计算机科学是X但不是Y时,请对他的研究生抱有同情心。
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。
Collaboration across nations is key to solving the challenges of overfishing.