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重点讲解：
1. to begin with 最初；刚开始；
It was great to begin with but now it's difficult.
一开始非常好，但现在可就难了。
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%。
3. at the very least （数量）至少，不少于；
Normally it has only had eleven or twelve members in all. Now it will have seventeen at the very least.
通常总共只有十一二个会员。现在将至少有十七个。
4. go up （价格、数量或水平）上涨，上升；
Interest rates went up.
利率上调了。
n. 分析，解析
