请问为什么要什么被动语态
问题描述：
请问为什么要什么被动语态
下面中句子中为什么要使用are acclimatized?
The different colorations and patterns are particularly useful in that they provide observers with an indication of what region the trout live in and whether they are acclimatized to an ocean or river environment.
thanks
答
因为acclimatize（使·······适应于环境）是使役动词,trout是长期自然环境使其适应的,是被适应的,而不是它使自然环境适应于它.in that是因为的意思.鳟鱼生活在······里适应于······里.