On the day I speak of he looked for the Menyanthes, detected it across the wide pool, and, on examination of the florets, decided that it had been in flower five days.

• 我要提到，一天他在寻找沼泽豆，探出它遍布在宽大的水塘里，通过详细观察这种小花，他断定它已经开花有五天。