unsown地里没有撒播的unsadj.不对称的unsaturated expansive soil非饱和膨胀土Unscheduled Engine Removal计划外发动机拆迁unstressed length of eable无应力索长unsymmetrical oscillations不对称振荡unsatuated polyester rosin不饱和聚酯unshunted hot-wire meter无分路式热线仪表unstructured overset grids非结构重叠网格unsaturated expansive clay非线性模型unsparingly criticize sb.毫不留情地批评某人unsupervised classifieation无监督分类