【句子展示】
However, when two monkeys were placed in separate but adjoining chambers, so that each could observe what the other was getting in return for its rock，their behavior became markedly different.
【句子分析】
单词短语：
adjoining：相邻的
chamber：房间
in return for…：作为…的回报
句式结构：
However, when two monkeys were placed in separate but adjoining chambers（时间状语从句）, so that each could observe（目的状语从句）what the other was getting in return for its rock（宾语从句），their behavior became markedly different.
参考译文：
然而，当两只猴子被安置在隔开但相邻的房间里，以便它们能够看到彼此用石块换取的东西时，它们的行为就会变得明显不同了。
