Doctor John Perry decided it was time to go home. It had been a perfect (完 美 的 ) day-a day alone, the first such day in many years. H e had filled his bag with all sorts of sea shells (贝 壳 ), enough to study for months. The island had been a goodplac Doctor John Perry decided it was time to go home. It had been a perfect (perfect) day-a day alone, the first such day in many years. H e had filled his bag with all sorts of sea shells (seashells), Enough to study for months. The island had been a goodplac