长难句：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 behaviour became markedly different.
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n重点词汇：so that,markedly
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n■答案■
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n1、长难句： 但是，当两个猴子被放在隔开但相邻的两个房间里，能够互相看见对方用石头换回来什么东西时，猴子的行为就会变得明显不同。
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n分析： 本句是一个复合句，开始是when引导的时间状语从句，其中包含so that 引导的目的状语从句，而observe后面又是what引导的宾语从句；最后是主句their behavior become markedly different。
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n2、so that是一个连接词，在英语中十分常见，可以表示目的。how do you raise your children so that they will have healthy relationships?（你怎样培养孩子，以便使他们能够建立健康的个人关系呢？） markedly意为“明显地，显著地”，其形容词形式为marked。he showed a marked lack of interest.（他表现出明显的兴趣不足。）