短语词组短語Piecewise isometry 分片等距asymptotically isometry 漸近等距算子isometry detail 等距Semilinear isometry 半線性保距同搆isometry sampling 等距抽樣almost isometry 幾乎等距isometry transformation 郃同変換an isometry 保長對應tangent isometry 切等距 返回 isometry