试题题干
Translate the following sentence into Chinese.
Until recently, this process was gradual, the result of change in climate, in habitat, or in the genes of the animals themselves.
参考答案
试题解析
考点：climate 气候；habitat 栖息地；gene 基因。
句子结构：句子主干为this process was gradual，the result of···修饰this process。