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重点讲解：
1. reflect on 沉思；深思；
例句：He reflected on his past mistakes.
他反省过去的错误。
2. die from 死于……；
例句：More die from the pot than from poverty.
酗酒而死者多于贫困。
3. according to 据…所说；按…所载；
例句：According to some philosopher, everything in existence is reasonable.
某位哲学家认为，存在的事物都是合理的。
4. result in 导致；引起；造成；
例句：Excessive dosage of this drug can result in injury to the liver.
这种药使用过量会损害肝脏。
5. as of 在…时；从…起；自…始；
例句：As of early September, the investigation had not concluded.
截至9月初，调查尚未结束。
6. on average 平均起来；按平均值；
例句：There is very little rain here, merely 60 mm in a year on average.
这儿雨水极少，平均每年只有60毫米。