进行: be in progress; be underway; ...爬升: climbout; swash; climb; mobi ...和: mix; blend下降: descend; go or come down; dr ...上升和下降: to ascend and to descend上升和下降时间: rise and fall times周期性上升和下降: cyclic upturn and downturn; cyclical upturn and downturn那么,一切上升和下降了一会儿,然后: well, everything goes uand down for a while, and then alex and进行自转下降: make an aviation立即进行下降: to make immediate descent爬升: [航空] climbout; swash; climb; mobility◇爬升机构 climbing device; 爬升角 angle of climb; 爬升塔式起重机 climbing tower crane进行穿云下降程序: to execute a letdown procedure铲行爬地齿: spade bug; spadebug; spare bug上和下: uand down; uanddown; uploading and downloading; upper and lower顶升和支撑: lifting and shoring提升和调动: promotion and transfer下降: descend; go or come down; drop; fall; decrease (in); decline; fall off; droop; downgrade 逐渐下降 decrease by degrees; 生产[体重] 下降 decrease in production [weight]; 引起下降 bring about its decline; 持续下降 steady decline; 下降到次要位置[地位] be relegated to a secondary position; 出生率下降 a decline in the birth rate; the birthrate is on the decline. 价格下降。 the prices are declining. 飞机正在下降。 the plane was descending. 气温显著下降。 there was a marked drop in temperature. 生产成本逐年下降。 production costs come down every year. 销售量下降了。 sales have dropped off爬升角: angle of climbing; climb angle爬升率: climb rate; rate of climb; rate-of-climb哈恩氏和下: hahns和下加拿大: lower canada和下瓦提: koxawat和下议院: the house of representative缓和下来: simmer down上和下,低与高: lower and upper