Wu, who has led his students in doing a survey of seacoast erosion, points to the verdant vegetations sprouting up through the grains and says to his students, "if you see these plants, that means this beach is very clean, that the water is clear and blue, and that there is a great deal of sunshine."
帶著學生做海岸流失調查的吳天雲，指著匍匐沙地上的綠色植物對學生說，「見到馬鞍藤就代表此地海岸很乾淨，海很淺、很藍，陽光普照。」