词汇	preopen set
释义	preopen set 预开集
随便看	marginal bundle marginal burden of tax marginal business marginal buyer marginal cable length marginal capacity marginal capital marginal capital coefficient marginal capital expenditure marginal capital output ratio marginal capital-output ratio marginal carina marginal carpellary bundle marginal case marginal category marginal cell marginal cells marginal cellule marginal cementing machine marginal chalazion marginal change marginal channel marginal check marginal checking marginal checking error detection