variation n. 1.变化,变动。 2.变量,变度,偏差。 3.【语言】语尾变化;变体,异体;【数学】变分,协变;顺列;【生物学】变异,演变,变种;【音乐】变奏曲;【天文学】变差;(月的)二均差;【物理学】磁差。 a principle without variation 不变的方针[原则]。 be capable of variation 可能变化。 be liable to variation 容易变化。 These prices are subject to variation. 上列价格可能变更。 adj. -al
area n. 1.面积;平地;地面。 2.空地;〔英国〕地下室前的空地。 3.地区,地方;〔比喻〕区域;范围。 a vast uncultivated area 广阔的未开垦地。 a mountainous area 山区。 a fortified area 要塞地带。 an area of investigation 研究范围。 the liberated areas 解放区。 an area of fire 【军事】射界。 This room is 16 square metres in area. 这个房间的面积为16平方米。
So far as the mixing material for building the earth-rock fill dam with clay core for shiquanhe hydropower station is concerned, the effect from the variation of the sand content for the filter material on the maximum dry density and the relevant parameters are to be determined within the variation area of the mixing mass ratio of ( 46 ~ 54 ) : ( 54 ~ 46 ) through this experiment, due to the max, dry density is largely influenced by the mixing ratio of both the lifter material and the clay and the sand content of the filter material, so as to determine the actual filling compactness of the mixing material of the core 摘要由于狮泉河水电站粘土心墙土石坝掺合料的最大干密度受反滤料与粘土料的掺合比例、反滤料含砂率的影响较大,因此拟通过本试验确定掺合质量比在(46~54):(54~46)范围变化时,反滤料含砂量变化对最大干密度的影响程度及相关参数,从而确定心墙掺合料填筑的实际压实度。