雅思写作常用词汇：峰值/较低值/超过　　peak/top/tip/summit/crest/pinnacle/apex/zenith 　　- eg: Tourism is at its peak in August.
; 　　bottom/foot/groud/nadir 　　- eg: The number of radio listeners declines rapidly, bottom out at 200 at 10 a.
m.
; 　　overtake/outnumber/exceed/surpass/outdo。