例126　On the whole such a conclusion can be drawn with a certain degree of confidence, but only if the child can be assumed to have had the same attitude towards the test as the others with whom he is being compared, and only if he was not punished by lack of relevant information which they possessed.

【结构分析】这句话是个典型的转折句，but前面是个被动语态，也就是such a conclusion can be drawn，后面是个介词短语做状语修饰整个句子，也就是with a certain degree of confidence, but后面谈的是这个结论的两个必要条件，是两个并列的条件状语从句，第一个条件句是only if the child can be assumed to have had the same attitude towards the test as the others，后面是定语从句with whom he is being compared，第二个条件句是only if he was not punished by lack of relevant information，后面是个定语从句which they possessed。

【亮点回放】此句话的亮点是两个条件句的超级使用，其中每个条件句里面都有定语从句，条件句套上定语从句很经典。

【核心词汇】

a conclusion can be drawn　得出这种结论

with a certain degree of confidence　有一定程度把握的

the others with whom he is being compared　与他比较的另一个孩子

by lack of relevant information which they possessed　缺乏别的孩子所具有的有关知识

【参考译文】总的来说，得出这种结论是有一定程度把握的，但是必须具备两个条件：能够假定这个孩子对测试的态度和与他比较的另一个孩子的态度相同；他也没有因为缺乏别的孩子所具有的有关知识而受影响。