.to gauge the effect that this had on a range of issues relating to education这里that和后面的句子是修饰谁的?effect吗?on是什么作用呢?是had \on a range还是had on \a range 原句是It compared children born in September – at the

.to gauge the effect that this had on a range of issues relating to education这里that和后面的句子是修饰谁的?effect吗?on是什么作用呢?是had \on a range还是had on \a range 原句是It compared children born in September – at the
.to gauge the effect that this had on a range of issues relating to education
这里that和后面的句子是修饰谁的?effect吗?on是什么作用呢?是had \on a range还是had on \a range
原句是It compared children born in September – at the start of the academic year – to those with birthdays in August to gauge the effect that this had on a range of issues relating to education .

.to gauge the effect that this had on a range of issues relating to education这里that和后面的句子是修饰谁的?effect吗?on是什么作用呢?是had \on a range还是had on \a range 原句是It compared children born in September – at the
that引导的是一个从句,后面的整句话用来修饰effect的.
on没有什么作用,on a range of是一个固定搭配,一系列的意思.
on a range of issues relating to education
这句话连在一起翻译就是一系列与教育有关的问题