增加：increase / raise / rise / go up / grow/ jump/ ascend
减少：decrease / grow down / drop / fall/decline/reduce/ descend
波动：fluctuate / rebound / undulate / wave ...
稳定：remain stable(steady) / stabilize / level off ...
最常用的两种表达法：
1. Verb+Adverb form
The number of XXX
+increase/jump/rise/decrease/drop/fall/fluctuate...
+insignificantly/significantly/slightly/suddenly/rapidly/dramatically/sharply/steeply/steadily/gradually/slowly...
+from (第一时间) to (第二时间) / between (第一时间) and (第二时间)
2. Adjective+Noun form
There was a (very) sudden/rapid/dramatic/significant/sharp/steep/steady/gradual/slow/slight
+increase/jump/rise/decrease/drop/fall/fluctuation (注意：上述很多词不可用于修饰fluctuation)
+in the number of XXX from (第一时间) to (第二时间) / between (第一时间) and (第二时间)
描述稳定的data：
The number of XXX remained steady/stable from (第一时间) to (第二时间) / between (第一时间) and (第二时间)
The number of XXX stayed the same from (第一时间) to (第二时间) / between (第一时间) and (第二时间)
There was little change / hardly any change / no change in the number of XXX from from (第一时间) to (第二时间) / between (第一时间) and (第二时间)
描述不同状态的data
Noun form:
steady drop / sharp rise peak / dramatic fall / sharp drop
Verbal form:
(to) bottom out / (to) reach the bottom / (to) increase gradually / (to) reach a plateau / (to) remain steady
描述the highest point以及the lowest point
高点极值：
The monthly profit / The figures / The situation ...
+peaked in (月份/年) <准确时间点用at XXX> at XXX% / XXX(极点data)
或者reached a peak / a high point at XXX% / XXX(极点data)
低点极值：
XXX bottomed out / reached
+rock / the bottom / a low point
或者hit a trough
此外，在描述过程中还有很多的conjunctional words/sentences，最常用的固定搭配如下：
并列： as well as(句首/中), also, as well(句尾), either, neither, too, moreover, furthermore, in addition, additionally, besides, what's more, apart from ...
举例： for example, for instance, to illustrate, as an illustration, in particular, particularly, especially
事实： as a matter of fact, in fact, actually, as long as, so long as ...
雷同/近似：similarly, likewise(句首/尾), at the same time, equally ...
转折： however, whereas, nevertheless, nonetheless, though, although, even though, while, yet, on the contrary, contrarily, in contrast, conversely, on the other hand, unlikely, in stead (of), in s123e of, des123e of ...
原因与结果
1. cause-suggestion (几乎不常用)
since / now that ...; I hope that...
because of/on account of/owing to/thanks to + (doing) sth, I hope that...
2. cause-effect (较常用)
XXX lead to / bring about / result in/ account for ...
(一个句子), therefore / thus / hence / as a result / consequently / (and) so ...
3. effect-cause (较常用)
XXX be caused by / result from / be the result of / be the effect of / be the consequence of ...
(一个句子), because ...
it is adj. that ...
it is unimaginable that ...
it is undeniable that ...
it is interesting to discover that ...
变化程度：sudden/suddenly 突然的，意外的
rapid/rapidly 迅速的，飞快的，险峻的
dramatic/dramatically 戏剧性的，生动的
significant/significantly 有意义的，重大的，重要的
sharp/sharply 锐利的，明显的，急剧的
steep/steeply 急剧升降的
steady/steadily 稳固的，坚定不移的
gradual/gradually 渐进的，逐渐的
slow/slowly 缓慢的，不活跃的
slight/slightly轻微的、略微地
stable/stably 稳定的
其它在描述中的常用到的词
significant changes 图中一些较大变化
noticeable trend 明显趋势
during the same period 在同一时期
distribute 分布，区别
unequally 不相等地
pronounced 明显的
average 平均
no doubt 无疑地
corresponding adj. 相应的，通讯的
represent vt. 阐述，表现
overall 总体上讲
in the case of adv. 在...的情况下
in terms of / in respect of / regarding 在...方面
