black-tie

It doesn't take long for freshers to adopt the Oxford way of life — working and playing hard, and feeling equally comfortable in black tie, subfusc (formal academic dress) or fancy dress.

大学新生不需要很长时间就能适应牛津的生----努力学习，尽情娱乐，同样舒适的黑色领带，暗色系的（正学位服）或者奇装异服。