雅思图表变化
雅思图表变化主要涉及以下几种：
静态图与动态图
静态图：描述某一现象在一段时间内的发展趋势，例如柱状图或饼状图，可能展示一家公司的营业额在两年内的变化。
动态图：展示一段时间或进程中的不同阶段，例如人口数量在20世纪的发展趋势。
上升/增长
常用表达：increase, rise, grow, go up, climb, ascend, mount, boom, leap, surge, soar。
例句：The number of first-time visitors has increased significantly over the past year。
下降/减少
常用表达：decrease, decline, drop, fall, slump, plunge, plummet, dip, sink, level out, level off, remain stable/steady/constant。
例句：The consumption of beef and lamb has fallen dramatically since 1990。
波动/变化
常用表达：fluctuate, vary, fluctuate significantly, vary noticeably。
例句：The stock market has been fluctuating wildly in the past few days。