一眾老師同助教神色凝重，到底喺度做緊乜？ (提示: 同Dr. Yung任教嘅數學課程有關。)
What are these teachers and teaching assistants being so serious about? (Hint: it’s related to the math course taught by Dr. Yung.)

謎底：Myth of Calculus。#打極都唔死 #備課備唔完