directed cloning造句

• Construction of rab5a gene eukaryotic expression vector by direct cloning
  1基因的克隆及其在成骨细胞中的表达
• Some chinese clones are direct or nearly - direct clones of other helicopters , but with a few changes ( probably to avoid patent issues )
  相对其他的直升机许多中国的是直接地或者近似地复制，但是有一点点的变化（大概是为了避免版权问题） 。