重点讲解：
1. be correlated with 相互关联；
Sunspot activity is correlated with the total amount of energy we receive from the sun.
太阳黑子的活动性与我们从太阳那获得的总能量密切相关_S*4%He]k,。
2. account for （数量或比例上）占；
Computers account for 5% of the country's commercial electricity consumption.
计算机占去该国商业用电的5%|SRBU00bJd(upK。
3. in general 总的来说；总体上来看；大体上；
I think we need to improve our educational system in general.
我认为有必要从整体上改进我们的教育体系bSRLWKkKO69@|s!v。
4. intervene in 干涉；干预；介入；
The United States has not intervened in currency markets since two thousand.
美国（政府）上一次干预货币市场还是在2000年的时候A4~ac[mW4a8sV。