5. Last year, the production of different kinds of farm tools in our factory increases (to) nine times, compared with 1999.
句型[主语+increase/rise等+(by)百分数+compared with]
1. The output of July in our factory increased (by) 250% compared with that of January.
2. Many countries have increased their farm output by 100 percent or more within a short space of time.
3. Over the past 17 years, Daqing has increased its annual output of crude oil by an average of 28 percent.
4. In 2007 crude oil production rose 150% compared with 2005, fulfilling the company plan two months ahead of schedule.
[注1] by表示增加的净数,也可用于倍数,如:It exceeded our estimate by 3 times.
The enemys forces were more than ours by 4 times.
[注2] 注意下面成语所含倍数的意义,加again 表示增加一倍,如:
He has books as much (many) as she. He has books half as much again as she.
分数减少表示法
句型[主语+reduce等+宾语+(by)分数或百分数]
1. The invention of many new tools in our factory has reduced the cost of production (by) one third, while the output has gone up (to) 160 percent.
2. The price of farm tools in our factory has reduced (或decreased) tow fifths.
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