应该：should, be supposed to, shall, have to, must,be required to, it is necessary for sb to
上升，增加：(vi.)increase, go up, rise, (vt.) increase,raise (n.) growth, rise, increase.
下降，减少/小：(vt.) decrease, reduce, lower (vi.) decrease,fall, drop, go/come down, decline. (n.) fall, decrease, decline, drop
变：change, alter, become(different/big/small/..), get, grow
编辑推荐
