词汇上升 上升:go up, increase, grow, rise, climb, ascend, expand, show an upward trend, gain, pick up, take off, mount 急剧上升： jump , soar, surge, escalate， rocket, swell, boom, leap, shoot up, skyrocket 缓慢上升： ease up, edge up, creep up, accrue The smoking rate in young girls was on the rise. 下降 下降:go down, decline, decrease, drop, fall (off), slide, slip, descend, dip, reduce, shrink, dwindle, diminish, show a downward trend, abate, slow down 急剧下降: crash, collapse, plummet, plunge, slump 缓慢下降：subside,
