主谓结构：描述内容 + 动词(表示趋势)+ 副词(表示幅度)
例：The number/ figure/ proportion/ percentage of students increased sharply from 100 in 1991 to 700 in 1994.
There be 结构： There be+ a+形容词(表示幅度)+ 名词(表示趋势)+in+描述内容
例：There was a sharp increase in the number/ figure/ proportion/ percentage of students from 100 in 1991 to 700 in 1994.
电量的需求在冬天9点到12点从30,000 units涨到了40,000 units。
Demand for electricity in winter increased from 30,000 units to 40,000 units between 9:00 and 12:00.
Demand for electricity in winter decreased to nearly 35,000 units at 20:00.
Demand for electricity in winter remained unchanged from 14:00 to 16:00 and sharply dropped after 20:00.
Demand for electricity in summer fluctuated slightly from 17:00 to 21:00.
达到最大值：reach the peak/ top/ highest point at
达到最小值: reach the bottom/lowest point at
drop to the bottom/lowest point at
Demand for electricity in winter reached the peak at about 45,000 units at 22:00.
Demand of electricity in summer decreased to the bottom just under 13,000 units at 9 o’clock.
The line graph compares three companies in terms of their waste output between the years 2000 and 2015.
It is clear that there were significant changes in the amounts of waste produced by all three companies shown on the graph. While companies A and B saw waste output fall over the 15-year period, the amount of waste produced by company C increased considerably.
In 2000, company A produced 12 tonnes of waste, while companies B and C produced around 8 tonnes and 4 tonnes of waste material respectively. Over the following 5 years, the waste output of companies B and C rose by around 2 tonnes, but the figure for company A fell by approximately 1 tonne.
From 2005 to 2015, company A cut waste production by roughly 3 tonnes, and company B reduced its waste by around 7 tonnes. By contrast, company C saw an increase in waste production of approximately 4 tonnes over the same 10-year period. By 2015, company C’s waste output had risen to 10 tonnes, while the respective amounts of waste from companies A and B had dropped to 8 tonnes and only 3 tonnes.