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Task 4 【名詞解釋】: search image(搜尋印象): by 多次捕食 preys, predators can memorize the image of a kind of preys。 With the image, predators can tell preys easily and catch them efficiently。 【教授舉例】:教授舉了一個(gè)關(guān)于 birds的例子。 A sort of caterpillars is green and lives on green leaves, and thus it is difficult for birds to tell at first,所以鳥(niǎo)就吃得少。 Later, birds developed search