1. Some changes have taken place in the past five years. 過去五年發(fā)生了很多變化。
　　2. Great changes will certainly be produced in the international communications. 在國際交流中理所當然會發(fā)生很多大的變化。
　　3. It has increased/decreased from…to… 他已經從…增加/減少到…。
　　4. The output of July in this factory increased by 15%. 這個工廠7月份產量以增加了15%。