一、將下列英文翻譯成中文。（20 分）  Although mutations do occur naturally in organisms over the course of many generations,research has shown that environmental factors—radiations and chemicals—increase therates and types of mutations. A prime example of this is the enormous increase in animaldeformations in areas surrounding the Chernobyl nuclear plant. Since the accident, 197deformed calves and about 200 abnormal piglets have been born. The severity of thesedeformities is frightening, including animals with no eyes, deformed skulls, and distortedmouths.