词汇	hourglass curve
释义	hourglass curve 沙漏线
随便看	cease to be available cease to be effective cease to be in effect Cease to be in effect cease to be in force Cease to be sth to cease to be under any contractual obligations cease to do cease to exist cease to function cease to have effect cease to matter cease trading cease with the September number cease work ceasing ceasing farming Ceasing grazing and grass planting Ceasing,he began to shave with care Ceasing, he began to shave with care ceasing herding ceasing herding engineering Cebader Cebadera cebaf