上升:increase、rise、ascend、core、surge、goup、climb、mount、levelup
下降:decrease、fall、drop、descend、decline、reduce、lessen、leveldown
平稳:stable、steady、remain/maintain/keep/bethesameas/similarto
波动:fluctuate、fluctuation、riseandfalls、upanddown
占:occupy、takeup、accountfor、gain
而:while、howeve、rwhereas、ontheotherhand、actually/infact
相比:bycontract、onthecontrary、likewise、comparedwith
最高点:thehighest、thetop、thesummit、thepeak、themost
最低点:bottom、less、least、rockbottom
平均:mean、average
趋势:tendancy、trend、inclination
预见:prediction
达到顶峰:mountto
在***中占***:***gainthepercentageof
有一个稳定的过程:astableperiodcanbeseen